#4C5FB1
Closest named color: French Blue (#436BAD). oklch(51.2% 0.131 271.3), rgb(76, 95, 177).
Aa
White text reads best on this color (5.86:1).
About this color
#4C5FB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.131 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.035 away. White text reads best on it, at 5.86:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.57:1 |
| White text | 5.86:1 |
Values
| HEX | #4C5FB1 |
| RGB | rgb(76, 95, 177) |
| HSL | hsl(229, 40%, 50%) |
| OKLCH | oklch(51.2% 0.131 271.3) |
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 #4C5FB1 | 5.86:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #4C5FB1 | 3.57:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #4C5FB1 text on white | 5.86:1 | AA | Lc 79.1 | Fine for body text |
| #4C5FB1 text on black | 3.57:1 | AA large text | Lc -22.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F1
oklch(88.4% 0.035 271.5)
-
Step 300
300
#B1BFEB
oklch(80.9% 0.064 271.1)
-
Step 400
400
#899DE0
oklch(70.7% 0.101 270.9)
-
Step 500
500
#6D83D8
oklch(63.1% 0.13 271.3)
-
Step 600
600
#566BC5
oklch(55.6% 0.141 271.3)
-
Step 700
700 (this color)
#4C5FB1
oklch(51.2% 0.131 271.3)
-
Step 800
800
#3A498A
oklch(42.7% 0.109 271.4)
-
Step 900
900
#313E6E
oklch(37.7% 0.084 270.5)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#4C5FB1 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) | #3969B4 | 0.031 |
| Deuteranopia (no green cones) | #2C60AF | 0.034 |
| Tritanopia (no blue cones) | #0B717F | 0.117 |
| Achromatopsia (no color) | #656565 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C5FB1
#4C5FB1
oklch(51.2% 0.131 271.3)
- #7D6300
#7D6300
oklch(51.1% 0.104 90.7)
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 #4C5FB1, closest first.
No curated palette has a color within ΔE 0.04 of #4C5FB1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.035
- Mid Blue #276AB3 ΔE 0.042
- Iris #6258C4 ΔE 0.047
- Dusky Blue #475F94 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.061
- Dark Periwinkle #665FD1 ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.063
Use #4C5FB1 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.