#5A63B3
Closest named color: French Blue (#436BAD). oklch(53.1% 0.125 276.4), rgb(90, 99, 179).
Aa
White text reads best on this color (5.42:1).
About this color
#5A63B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.125 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.036 away. White text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #5A63B3 |
| RGB | rgb(90, 99, 179) |
| HSL | hsl(234, 37%, 53%) |
| OKLCH | oklch(53.1% 0.125 276.4) |
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 #5A63B3 | 5.42:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #5A63B3 | 3.87:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #5A63B3 text on white | 5.42:1 | AA | Lc 76.9 | Fine for body text |
| #5A63B3 text on black | 3.87:1 | AA large text | Lc -24.8 | 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 600.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EE
oklch(88.5% 0.031 275.6)
-
Step 300
300
#B6BEE5
oklch(80.8% 0.056 276)
-
Step 400
400
#919CD9
oklch(70.7% 0.09 276)
-
Step 500
500
#7782CE
oklch(63% 0.115 276.3)
-
Step 600
600 (this color)
#5A63B3
oklch(53.1% 0.125 276.4)
-
Step 700
700
#5058A1
oklch(49% 0.116 276.5)
-
Step 800
800
#424983
oklch(42.8% 0.096 276.4)
-
Step 900
900
#373D69
oklch(37.6% 0.075 276.3)
-
Step 950
950
#20243D
oklch(26.9% 0.047 275.9)
#5A63B3 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) | #426EB6 | 0.038 |
| Deuteranopia (no green cones) | #3A66B1 | 0.038 |
| Tritanopia (no blue cones) | #377482 | 0.110 |
| Achromatopsia (no color) | #6A6A6A | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A63B3
#5A63B3
oklch(53.1% 0.125 276.4)
- #7F6B00
#7F6B00
oklch(53.1% 0.109 96.1)
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 #5A63B3, closest first.
No curated palette has a color within ΔE 0.04 of #5A63B3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.036
- Iris #6258C4 ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.053
- Dusky Blue #475F94 ΔE 0.057
- Light Indigo #6D5ACF ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.059
Use #5A63B3 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.