#251739
Closest named color: Oxford Blue (#1B263B). oklch(24.2% 0.064 300.7), rgb(37, 23, 57).
Aa
White text reads best on this color (16.66:1).
About this color
#251739 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.064 and its hue 301°. 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 16.66:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.26:1 |
| White text | 16.66:1 |
Values
| HEX | #251739 |
| RGB | rgb(37, 23, 57) |
| HSL | hsl(265, 43%, 16%) |
| OKLCH | oklch(24.2% 0.064 300.7) |
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 #251739 | 16.66:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #251739 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #251739 text on white | 16.66:1 | AAA | Lc 103.5 | Preferred for body text |
| #251739 text on black | 1.26:1 | 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
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F1
oklch(88.4% 0.042 300.7)
-
Step 300
300
#C8B6EB
oklch(80.9% 0.076 300.3)
-
Step 400
400
#AD8EE0
oklch(70.6% 0.121 300.7)
-
Step 500
500
#9A70D8
oklch(63.2% 0.155 300.7)
-
Step 600
600
#8555C5
oklch(55.5% 0.169 300.8)
-
Step 700
700
#7145AA
oklch(49.1% 0.157 300.9)
-
Step 800
800
#5C398A
oklch(42.7% 0.131 300.9)
-
Step 900
900
#4B326E
oklch(37.6% 0.101 300.9)
-
Step 950
950 (this color)
#251739
oklch(24.2% 0.064 300.7)
#251739 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) | #0B1E3A | 0.045 |
| Deuteranopia (no green cones) | #0F1E38 | 0.042 |
| Tritanopia (no blue cones) | #211D25 | 0.048 |
| Achromatopsia (no color) | #1E1E1E | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #251739
#251739
oklch(24.2% 0.064 300.7)
- #1C2300
#1C2300
oklch(24.1% 0.057 120.1)
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 #251739, 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 Purple #35063E ΔE 0.050
- Dark #1B2431 ΔE 0.050
- Eggplant #380835 ΔE 0.051
- Midnight Purple #280137 ΔE 0.052
- Very Dark Purple #2A0134 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.055
- Deep Purple #36013F ΔE 0.058
Use #251739 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.