#5366B1
Closest named color: French Blue (#436BAD). oklch(53.1% 0.12 271.1), rgb(83, 102, 177).
Aa
White text reads best on this color (5.38:1).
About this color
#5366B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.120 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.024 away. White text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.90:1 |
| White text | 5.38:1 |
Values
| HEX | #5366B1 |
| RGB | rgb(83, 102, 177) |
| HSL | hsl(228, 38%, 51%) |
| OKLCH | oklch(53.1% 0.12 271.1) |
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 #5366B1 | 5.38:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #5366B1 | 3.90:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #5366B1 text on white | 5.38:1 | AA | Lc 76.7 | Fine for body text |
| #5366B1 text on black | 3.90:1 | AA large text | Lc -25.1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D2D9EE
oklch(88.6% 0.03 271.1)
-
Step 300
300
#B3BFE4
oklch(80.8% 0.054 271)
-
Step 400
400
#8D9ED7
oklch(70.8% 0.086 271.3)
-
Step 500
500
#7185CC
oklch(63.1% 0.11 271)
-
Step 600
600 (this color)
#5366B1
oklch(53.1% 0.12 271.1)
-
Step 700
700
#4A5BA0
oklch(49.1% 0.112 271.3)
-
Step 800
800
#3D4B81
oklch(42.8% 0.091 271.1)
-
Step 900
900
#343F68
oklch(37.8% 0.072 271.3)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#5366B1 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) | #476FB4 | 0.026 |
| Deuteranopia (no green cones) | #3C67AF | 0.027 |
| Tritanopia (no blue cones) | #267683 | 0.106 |
| Achromatopsia (no color) | #6A6A6A | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5366B1
#5366B1
oklch(53.1% 0.12 271.1)
- #836900
#836900
oklch(53.1% 0.109 91.7)
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 #5366B1, closest first.
No curated palette has a color within ΔE 0.04 of #5366B1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.024
- Mid Blue #276AB3 ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.047
- Dusky Blue #475F94 ΔE 0.051
- Iris #6258C4 ΔE 0.053
- Muted Blue #3B719F ΔE 0.053
- Windows Blue #3778BF ΔE 0.053
- Dull Blue #49759C ΔE 0.061
Use #5366B1 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.