#28233B
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.044 292.8), rgb(40, 35, 59).
Aa
White text reads best on this color (15.06:1).
About this color
#28233B is a dark, muted purple. In OKLCH its lightness is 27%, its chroma 0.044 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.023 away. White text reads best on it, at 15.06:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | muted (0.044) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.06:1 |
Values
| HEX | #28233B |
| RGB | rgb(40, 35, 59) |
| HSL | hsl(252, 26%, 18%) |
| OKLCH | oklch(27.3% 0.044 292.8) |
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 #28233B | 15.06:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #28233B | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #28233B text on white | 15.06:1 | AAA | Lc 101.9 | Preferred for body text |
| #28233B 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
#EAE8F3
oklch(93.6% 0.015 294.5)
-
Step 200
200
#D9D6EB
oklch(88.5% 0.029 292.4)
-
Step 300
300
#C1BBE0
oklch(80.9% 0.052 292.6)
-
Step 400
400
#A297D1
oklch(70.7% 0.084 292.8)
-
Step 500
500
#8C7DC4
oklch(63.2% 0.106 292.8)
-
Step 600
600
#7665B1
oklch(55.6% 0.116 292.5)
-
Step 700
700
#635398
oklch(49% 0.108 292.6)
-
Step 800
800
#51447B
oklch(42.6% 0.09 293.1)
-
Step 900
900
#433A63
oklch(37.7% 0.069 292.9)
-
Step 950
950 (this color)
#28233B
oklch(27.3% 0.044 292.8)
#28233B 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 | 0.021 |
| Deuteranopia (no green cones) | #1D263A | 0.021 |
| Tritanopia (no blue cones) | #24272C | 0.036 |
| Achromatopsia (no color) | #262626 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28233B
#28233B
oklch(27.3% 0.044 292.8)
- #27290E
#27290E
oklch(27.2% 0.044 112.8)
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 #28233B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.023
- Dark #1B2431 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.033
- Jet #212529 ΔE 0.040
- Gunmetal #293241 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.068
- Eggplant #380835 ΔE 0.072
Use #28233B 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.