#28253B
Closest named color: Oxford Blue (#1B263B). oklch(27.8% 0.04 289.8), rgb(40, 37, 59).
Aa
White text reads best on this color (14.80:1).
About this color
#28253B is a dark, muted purple. In OKLCH its lightness is 28%, its chroma 0.040 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.021 away. White text reads best on it, at 14.80:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.41:1 |
| White text | 14.80:1 |
Values
| HEX | #28253B |
| RGB | rgb(40, 37, 59) |
| HSL | hsl(248, 23%, 19%) |
| OKLCH | oklch(27.8% 0.04 289.8) |
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 #28253B | 14.80:1 | AAA | Lc -104.5 | Preferred for body text |
| Black text on #28253B | 1.41:1 | Fails | Lc 0.0 | Not readable |
| #28253B text on white | 14.80:1 | AAA | Lc 101.6 | Preferred for body text |
| #28253B text on black | 1.41:1 | 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
#E9E8F3
oklch(93.5% 0.015 290.3)
-
Step 200
200
#D8D7EA
oklch(88.6% 0.026 288.3)
-
Step 300
300
#BFBCDE
oklch(80.9% 0.048 289.3)
-
Step 400
400
#9F99CD
oklch(70.7% 0.075 289.6)
-
Step 500
500
#887FC1
oklch(63.1% 0.098 289.5)
-
Step 600
600
#7368AD
oklch(55.7% 0.105 289.8)
-
Step 700
700
#605694
oklch(49.1% 0.098 289.7)
-
Step 800
800
#4E4778
oklch(42.7% 0.08 289.1)
-
Step 900
900
#413B61
oklch(37.6% 0.064 290.2)
-
Step 950
950 (this color)
#28253B
oklch(27.8% 0.04 289.8)
#28253B 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) | #1F283C | 0.017 |
| Deuteranopia (no green cones) | #1F273A | 0.016 |
| Tritanopia (no blue cones) | #24292D | 0.034 |
| Achromatopsia (no color) | #282828 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28253B
#28253B
oklch(27.8% 0.04 289.8)
- #2A2A12
#2A2A12
oklch(27.8% 0.039 108.7)
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 #28253B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.021
- Space Cadet #2B2D42 ΔE 0.028
- Dark #1B2431 ΔE 0.030
- Jet #212529 ΔE 0.037
- Gunmetal #293241 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.064
- Rich Black #0D1B2A ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.071
Use #28253B 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.