#4D63B2
Closest named color: French Blue (#436BAD). oklch(52.1% 0.127 269.9), rgb(77, 99, 178).
Aa
White text reads best on this color (5.61:1).
About this color
#4D63B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.127 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.026 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #4D63B2 |
| RGB | rgb(77, 99, 178) |
| HSL | hsl(227, 40%, 50%) |
| OKLCH | oklch(52.1% 0.127 269.9) |
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 #4D63B2 | 5.61:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #4D63B2 | 3.74:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #4D63B2 text on white | 5.61:1 | AA | Lc 77.9 | Fine for body text |
| #4D63B2 text on black | 3.74:1 | AA large text | Lc -23.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B1BFE9
oklch(80.8% 0.061 270.5)
-
Step 400
400
#889EDF
oklch(70.8% 0.099 269.4)
-
Step 500
500
#6C84D5
oklch(63.1% 0.125 270)
-
Step 600
600
#546CC3
oklch(55.5% 0.138 269.9)
-
Step 700
700 (this color)
#4D63B2
oklch(52.1% 0.127 269.9)
-
Step 800
800
#394A88
oklch(42.7% 0.105 270)
-
Step 900
900
#313E6D
oklch(37.7% 0.082 270.4)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#4D63B2 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) | #406CB5 | 0.026 |
| Deuteranopia (no green cones) | #3363B0 | 0.029 |
| Tritanopia (no blue cones) | #0D7482 | 0.113 |
| Achromatopsia (no color) | #686868 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D63B2
#4D63B2
oklch(52.1% 0.127 269.9)
- #816500
#816500
oklch(52% 0.106 89.6)
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 #4D63B2, closest first.
No curated palette has a color within ΔE 0.04 of #4D63B2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.026
- Mid Blue #276AB3 ΔE 0.038
- Dusky Blue #475F94 ΔE 0.049
- Iris #6258C4 ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.052
- Muted Blue #3B719F ΔE 0.057
- Windows Blue #3778BF ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
Use #4D63B2 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.