#5663A3
Closest named color: French Blue (#436BAD). oklch(51.8% 0.102 273.6), rgb(86, 99, 163).
Aa
White text reads best on this color (5.66:1).
About this color
#5663A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.102 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.031 away. White text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #5663A3 |
| RGB | rgb(86, 99, 163) |
| HSL | hsl(230, 31%, 49%) |
| OKLCH | oklch(51.8% 0.102 273.6) |
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 #5663A3 | 5.66:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #5663A3 | 3.70:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #5663A3 text on white | 5.66:1 | AA | Lc 78.2 | Fine for body text |
| #5663A3 text on black | 3.70:1 | AA large text | Lc -23.6 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B6BFE1
oklch(80.9% 0.049 273.6)
-
Step 400
400
#919DD3
oklch(70.7% 0.08 274.5)
-
Step 500
500
#7685C7
oklch(63.2% 0.101 273.4)
-
Step 600
600
#5F6DB3
oklch(55.5% 0.11 273.7)
-
Step 700
700 (this color)
#5663A3
oklch(51.8% 0.102 273.6)
-
Step 800
800
#404B7D
oklch(42.7% 0.084 273)
-
Step 900
900
#363F65
oklch(37.8% 0.066 272.7)
-
Step 950
950
#20253B
oklch(27.1% 0.042 273.5)
#5663A3 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) | #4B6AA6 | 0.022 |
| Deuteranopia (no green cones) | #4464A2 | 0.023 |
| Tritanopia (no blue cones) | #3A707B | 0.090 |
| Achromatopsia (no color) | #676767 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5663A3
#5663A3
oklch(51.8% 0.102 273.6)
- #7C660C
#7C660C
oklch(51.7% 0.102 93.3)
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 #5663A3, closest first.
No curated palette has a color within ΔE 0.04 of #5663A3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.031
- Dusky Blue #475F94 ΔE 0.033
- Muted Blue #3B719F ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.051
- Denim #3B638C ΔE 0.052
- Dull Blue #49759C ΔE 0.056
Use #5663A3 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.