#25243B
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.042 285.2), rgb(37, 36, 59).
Aa
White text reads best on this color (15.06:1).
About this color
#25243B is a dark, muted purple. In OKLCH its lightness is 27%, its chroma 0.042 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.017 away. White text reads best on it, at 15.06:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.06:1 |
Values
| HEX | #25243B |
| RGB | rgb(37, 36, 59) |
| HSL | hsl(243, 24%, 19%) |
| OKLCH | oklch(27.3% 0.042 285.2) |
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 #25243B | 15.06:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #25243B | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #25243B text on white | 15.06:1 | AAA | Lc 101.9 | Preferred for body text |
| #25243B text on black | 1.39:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D7D7EB
oklch(88.5% 0.027 285.8)
-
Step 300
300
#BDBDE0
oklch(81% 0.049 285.3)
-
Step 400
400
#9B9AD1
oklch(70.7% 0.08 285)
-
Step 500
500
#8380C5
oklch(63.1% 0.103 285)
-
Step 600
600
#6D69B1
oklch(55.6% 0.11 284.8)
-
Step 700
700
#5C5799
oklch(49.2% 0.104 285.4)
-
Step 800
800
#4B477C
oklch(42.7% 0.086 285.6)
-
Step 900
900
#3E3C63
oklch(37.7% 0.066 285.1)
-
Step 950
950 (this color)
#25243B
oklch(27.3% 0.042 285.2)
#25243B 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) | #1D273C | 0.015 |
| Deuteranopia (no green cones) | #1D263A | 0.015 |
| Tritanopia (no blue cones) | #1F282C | 0.037 |
| Achromatopsia (no color) | #262626 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25243B
#25243B
oklch(27.3% 0.042 285.2)
- #2A280E
#2A280E
oklch(27.2% 0.042 104.8)
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 #25243B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.017
- Dark #1B2431 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.033
- Jet #212529 ΔE 0.037
- Gunmetal #293241 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.066
- Marine #042E60 ΔE 0.074
Use #25243B 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.