#4C257B
Closest named color: Indigo (#4B0082). oklch(36.6% 0.139 300.4), rgb(76, 37, 123).
Aa
White text reads best on this color (11.30:1).
About this color
#4C257B is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.139 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.049 away. White text reads best on it, at 11.30:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #4C257B |
| RGB | rgb(76, 37, 123) |
| HSL | hsl(267, 54%, 31%) |
| OKLCH | oklch(36.6% 0.139 300.4) |
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 #4C257B | 11.30:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #4C257B | 1.85:1 | Fails | Lc 8.4 | Not readable |
| #4C257B text on white | 11.30:1 | AAA | Lc 95.5 | Preferred for body text |
| #4C257B text on black | 1.85:1 | Fails | Lc 0.0 | Not readable |
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 900.
-
Step 50
50
#F7F3FE
oklch(97% 0.015 302.6)
-
Step 100
100
#EDE6FC
oklch(93.7% 0.03 300.3)
-
Step 200
200
#DFD1FA
oklch(88.5% 0.058 300.8)
-
Step 300
300
#CBB1FA
oklch(80.8% 0.105 300.4)
-
Step 400
400
#B285F8
oklch(70.8% 0.167 300.2)
-
Step 500
500
#A060F4
oklch(63.1% 0.213 300.3)
-
Step 600
600
#8C3FE3
oklch(55.6% 0.233 300.2)
-
Step 700
700
#772FC5
oklch(49.1% 0.216 300.2)
-
Step 800
800
#61299F
oklch(42.6% 0.179 300.5)
-
Step 900
900 (this color)
#4C257B
oklch(36.6% 0.139 300.4)
-
Step 950
950
#2E194A
oklch(27% 0.088 300.4)
#4C257B 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) | #003A7E | 0.100 |
| Deuteranopia (no green cones) | #003A79 | 0.101 |
| Tritanopia (no blue cones) | #42394D | 0.103 |
| Achromatopsia (no color) | #3A3A3A | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C257B
#4C257B
oklch(36.6% 0.139 300.4)
- #394500
#394500
oklch(36.7% 0.087 120.3)
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 #4C257B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.049
- Royal Purple #4B006E ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.077
- Rebecca Purple #663399 ΔE 0.077
- Imperial Purple #480CA8 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.085
- Chrysanthemum #560BAD ΔE 0.086
Use #4C257B 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.