#647DF4
Closest named color: Cornflower (#6A79F7). oklch(63% 0.179 271.5), rgb(100, 125, 244).
Aa
Black text reads best on this color (5.78:1).
About this color
#647DF4 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.179 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.013 away. Black text reads best on it, at 5.78:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.78:1 |
| White text | 3.63:1 |
Values
| HEX | #647DF4 |
| RGB | rgb(100, 125, 244) |
| HSL | hsl(230, 87%, 67%) |
| OKLCH | oklch(63% 0.179 271.5) |
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 #647DF4 | 3.63:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #647DF4 | 5.78:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #647DF4 text on white | 3.63:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #647DF4 text on black | 5.78:1 | AA | Lc -38.0 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEFA
oklch(80.9% 0.087 271.4)
-
Step 400
400
#819AF8
oklch(70.7% 0.141 271.2)
-
Step 500
500 (this color)
#647DF4
oklch(63% 0.179 271.5)
-
Step 600
600
#4E63E3
oklch(55.6% 0.195 271.5)
-
Step 700
700
#3F51C5
oklch(49.1% 0.181 271.4)
-
Step 800
800
#34439F
oklch(42.7% 0.149 271.6)
-
Step 900
900
#2C3A7F
oklch(37.7% 0.117 271.1)
-
Step 950
950
#1A224A
oklch(26.9% 0.075 272)
#647DF4 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) | #3F8DF8 | 0.048 |
| Deuteranopia (no green cones) | #2380F2 | 0.054 |
| Tritanopia (no blue cones) | #0098AD | 0.156 |
| Achromatopsia (no color) | #868686 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647DF4
#647DF4
oklch(63% 0.179 271.5)
- #A68500
#A68500
oklch(63% 0.129 91.2)
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 #647DF4, closest first.
No curated palette has a color within ΔE 0.04 of #647DF4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.013
- Soft Blue #6488EA ΔE 0.034
- Medium Slate Blue #7B68EE ΔE 0.054
- Clear Blue #247AFD ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Periwinkle #8E82FE ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.063
Use #647DF4 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.