#647FE4
Closest named color: Soft Blue (#6488EA). oklch(62.4% 0.155 270.2), rgb(100, 127, 228).
Aa
Black text reads best on this color (5.69:1).
About this color
#647FE4 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.155 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.024 away. Black text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.69:1 |
| White text | 3.68:1 |
Values
| HEX | #647FE4 |
| RGB | rgb(100, 127, 228) |
| HSL | hsl(227, 70%, 64%) |
| OKLCH | oklch(62.4% 0.155 270.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #647FE4 | 3.68:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #647FE4 | 5.69:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #647FE4 text on white | 3.68:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #647FE4 text on black | 5.69:1 | AA | Lc -37.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#ADBFF3
oklch(80.9% 0.076 269.8)
-
Step 400
400
#839CEC
oklch(70.7% 0.121 269.9)
-
Step 500
500 (this color)
#647FE4
oklch(62.4% 0.155 270.2)
-
Step 600
600
#4F68D4
oklch(55.6% 0.168 270.3)
-
Step 700
700
#4056B8
oklch(49.1% 0.156 270.2)
-
Step 800
800
#354795
oklch(42.8% 0.129 270.3)
-
Step 900
900
#2D3C77
oklch(37.6% 0.102 270.2)
-
Step 950
950
#1A2445
oklch(27% 0.063 269.2)
#647FE4 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #528BE8 | 0.033 |
| Deuteranopia (no green cones) | #4180E2 | 0.036 |
| Tritanopia (no blue cones) | #1095A6 | 0.139 |
| Achromatopsia (no color) | #858585 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647FE4
#647FE4
oklch(62.4% 0.155 270.2)
- #A58300
#A58300
oklch(62.4% 0.128 90.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #647FE4, closest first.
No curated palette has a color within ΔE 0.04 of #647FE4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.024
- Cornflower #6A79F7 ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.059
- Medium Slate Blue #7B68EE ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.068
Use #647FE4 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.