#251737
Closest named color: Oxford Blue (#1B263B). oklch(24% 0.061 302.2), rgb(37, 23, 55).
Aa
White text reads best on this color (16.71:1).
About this color
#251737 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.061 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.049 away. White text reads best on it, at 16.71:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.061) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.25:1 |
| White text | 16.71:1 |
Values
| HEX | #251737 |
| RGB | rgb(37, 23, 55) |
| HSL | hsl(266, 41%, 15%) |
| OKLCH | oklch(24% 0.061 302.2) |
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 #251737 | 16.71:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #251737 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #251737 text on white | 16.71:1 | AAA | Lc 103.5 | Preferred for body text |
| #251737 text on black | 1.25:1 | 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 950.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DED3F0
oklch(88.5% 0.041 302.8)
-
Step 300
300
#C9B6E8
oklch(80.9% 0.072 302.2)
-
Step 400
400
#AE8FDC
oklch(70.7% 0.114 302.1)
-
Step 500
500
#9B71D3
oklch(63.2% 0.148 302.1)
-
Step 600
600
#8657C0
oklch(55.6% 0.16 302.1)
-
Step 700
700
#7246A6
oklch(49.1% 0.15 302.3)
-
Step 800
800
#5C3A86
oklch(42.6% 0.124 302.1)
-
Step 900
900
#4C336B
oklch(37.7% 0.096 302.7)
-
Step 950
950 (this color)
#251737
oklch(24% 0.061 302.2)
#251737 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) | #0D1E38 | 0.044 |
| Deuteranopia (no green cones) | #111E36 | 0.040 |
| Tritanopia (no blue cones) | #221D24 | 0.047 |
| Achromatopsia (no color) | #1E1E1E | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #251737
#251737
oklch(24% 0.061 302.2)
- #1B2300
#1B2300
oklch(24% 0.058 121.5)
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 #251737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.049
- Dark #1B2431 ΔE 0.049
- Dark Purple #35063E ΔE 0.051
- Eggplant #380835 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.053
- Midnight Purple #280137 ΔE 0.053
- Very Dark Purple #2A0134 ΔE 0.053
- Deep Purple #36013F ΔE 0.059
Use #251737 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.