#4B5EB5
Closest named color: French Blue (#436BAD). oklch(51.2% 0.139 271.5), rgb(75, 94, 181).
Aa
White text reads best on this color (5.88:1).
About this color
#4B5EB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.139 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.040 away. White text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #4B5EB5 |
| RGB | rgb(75, 94, 181) |
| HSL | hsl(229, 42%, 50%) |
| OKLCH | oklch(51.2% 0.139 271.5) |
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 #4B5EB5 | 5.88:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #4B5EB5 | 3.56:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #4B5EB5 text on white | 5.88:1 | AA | Lc 79.2 | Fine for body text |
| #4B5EB5 text on black | 3.56:1 | AA large text | Lc -22.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B1BFED
oklch(81% 0.067 271.6)
-
Step 400
400
#889CE4
oklch(70.6% 0.108 271.6)
-
Step 500
500
#6C82DC
oklch(63% 0.138 271.6)
-
Step 600
600
#556AC9
oklch(55.6% 0.148 271.4)
-
Step 700
700 (this color)
#4B5EB5
oklch(51.2% 0.139 271.5)
-
Step 800
800
#39488D
oklch(42.6% 0.115 271.5)
-
Step 900
900
#313D71
oklch(37.7% 0.09 271.7)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#4B5EB5 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) | #3469B8 | 0.034 |
| Deuteranopia (no green cones) | #2360B3 | 0.039 |
| Tritanopia (no blue cones) | #007281 | 0.123 |
| Achromatopsia (no color) | #646464 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5EB5
#4B5EB5
oklch(51.2% 0.139 271.5)
- #7D6400
#7D6400
oklch(51.3% 0.105 91.6)
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 #4B5EB5, closest first.
No curated palette has a color within ΔE 0.04 of #4B5EB5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.040
- Iris #6258C4 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.063
Use #4B5EB5 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.