#647DE1
Closest named color: Soft Blue (#6488EA). oklch(61.8% 0.153 270.8), rgb(100, 125, 225).
Aa
Black text reads best on this color (5.56:1).
About this color
#647DE1 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.153 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.030 away. Black text reads best on it, at 5.56:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.56:1 |
| White text | 3.77:1 |
Values
| HEX | #647DE1 |
| RGB | rgb(100, 125, 225) |
| HSL | hsl(228, 68%, 64%) |
| OKLCH | oklch(61.8% 0.153 270.8) |
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 #647DE1 | 3.77:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #647DE1 | 5.56:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #647DE1 text on white | 3.77:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #647DE1 text on black | 5.56:1 | AA | Lc -36.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#859CEC
oklch(70.8% 0.12 270.9)
-
Step 500
500 (this color)
#647DE1
oklch(61.8% 0.153 270.8)
-
Step 600
600
#5068D3
oklch(55.5% 0.166 270.6)
-
Step 700
700
#4256B7
oklch(49.1% 0.154 270.9)
-
Step 800
800
#364794
oklch(42.7% 0.128 270.8)
-
Step 900
900
#2E3C76
oklch(37.6% 0.1 270.7)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#647DE1 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) | #5089E5 | 0.034 |
| Deuteranopia (no green cones) | #407EDF | 0.037 |
| Tritanopia (no blue cones) | #1993A4 | 0.137 |
| Achromatopsia (no color) | #838383 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647DE1
#647DE1
oklch(61.8% 0.153 270.8)
- #A28100
#A28100
oklch(61.7% 0.126 90.6)
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 #647DE1, closest first.
No curated palette has a color within ΔE 0.04 of #647DE1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.030
- Cornflower #6A79F7 ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.063
- Chefchaouen Blue #4895EF ΔE 0.064
- Clear Blue #247AFD ΔE 0.069
- Royal Blue #4169E1 ΔE 0.069
Use #647DE1 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.