#4B5EB3
Closest named color: French Blue (#436BAD). oklch(51% 0.136 271.4), rgb(75, 94, 179).
Aa
White text reads best on this color (5.91:1).
About this color
#4B5EB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.136 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.039 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.55:1 |
| White text | 5.91:1 |
Values
| HEX | #4B5EB3 |
| RGB | rgb(75, 94, 179) |
| HSL | hsl(229, 41%, 50%) |
| OKLCH | oklch(51% 0.136 271.4) |
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 #4B5EB3 | 5.91:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #4B5EB3 | 3.55:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #4B5EB3 text on white | 5.91:1 | AA | Lc 79.4 | Fine for body text |
| #4B5EB3 text on black | 3.55:1 | AA large text | Lc -22.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F2
oklch(88.4% 0.037 272)
-
Step 300
300
#B1BFEC
oklch(80.9% 0.066 271.4)
-
Step 400
400
#899DE2
oklch(70.8% 0.104 271.2)
-
Step 500
500
#6C83DA
oklch(63.1% 0.134 271)
-
Step 600
600
#556AC8
oklch(55.5% 0.147 271.4)
-
Step 700
700 (this color)
#4B5EB3
oklch(51% 0.136 271.4)
-
Step 800
800
#39498C
oklch(42.8% 0.112 270.9)
-
Step 900
900
#313D70
oklch(37.6% 0.088 271.6)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#4B5EB3 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) | #3569B6 | 0.034 |
| Deuteranopia (no green cones) | #2660B1 | 0.037 |
| Tritanopia (no blue cones) | #007180 | 0.120 |
| Achromatopsia (no color) | #646464 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5EB3
#4B5EB3
oklch(51% 0.136 271.4)
- #7C6300
#7C6300
oklch(51% 0.104 91.4)
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 #4B5EB3, closest first.
No curated palette has a color within ΔE 0.04 of #4B5EB3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.039
- Mid Blue #276AB3 ΔE 0.043
- Iris #6258C4 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.061
- Slate Blue #6A5ACD ΔE 0.061
- Flat Blue #3C73A8 ΔE 0.065
Use #4B5EB3 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.