#4C51AE
Closest named color: Iris (#6258C4). oklch(48.1% 0.146 277.1), rgb(76, 81, 174).
Aa
White text reads best on this color (6.78:1).
About this color
#4C51AE is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.146 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.052 away. White text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #4C51AE |
| RGB | rgb(76, 81, 174) |
| HSL | hsl(237, 39%, 49%) |
| OKLCH | oklch(48.1% 0.146 277.1) |
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 #4C51AE | 6.78:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #4C51AE | 3.09:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #4C51AE text on white | 6.78:1 | AA | Lc 83.1 | Fine for body text |
| #4C51AE text on black | 3.09:1 | AA large text | Lc -18.8 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F4
oklch(88.4% 0.04 277.8)
-
Step 300
300
#B5BDEF
oklch(80.9% 0.071 277.6)
-
Step 400
400
#8F9AE6
oklch(70.8% 0.112 276.9)
-
Step 500
500
#757EDF
oklch(63% 0.145 277.4)
-
Step 600
600
#5F66CD
oklch(55.7% 0.157 277.1)
-
Step 700
700 (this color)
#4C51AE
oklch(48.1% 0.146 277.1)
-
Step 800
800
#40458F
oklch(42.6% 0.12 277.1)
-
Step 900
900
#363B72
oklch(37.7% 0.093 277)
-
Step 950
950
#1F2343
oklch(27% 0.059 276.3)
#4C51AE 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) | #1B5FB1 | 0.054 |
| Deuteranopia (no green cones) | #0357AC | 0.059 |
| Tritanopia (no blue cones) | #176677 | 0.128 |
| Achromatopsia (no color) | #5B5B5B | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C51AE
#4C51AE
oklch(48.1% 0.146 277.1)
- #6E5D00
#6E5D00
oklch(48.1% 0.099 96.7)
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 #4C51AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.052
- Blueberry #464196 ΔE 0.055
- Twilight #4E518B ΔE 0.057
- Denim Blue #3B5B92 ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Dusky Blue #475F94 ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.062
- French Blue #436BAD ΔE 0.070
Use #4C51AE 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.