#23253B
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.041 279.3), rgb(35, 37, 59).
Aa
White text reads best on this color (15.00:1).
About this color
#23253B is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.041 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.013 away. White text reads best on it, at 15.00:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.00:1 |
Values
| HEX | #23253B |
| RGB | rgb(35, 37, 59) |
| HSL | hsl(235, 26%, 18%) |
| OKLCH | oklch(27.3% 0.041 279.3) |
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 #23253B | 15.00:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #23253B | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #23253B text on white | 15.00:1 | AAA | Lc 101.9 | Preferred for body text |
| #23253B 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#B9BEE0
oklch(80.9% 0.048 278.7)
-
Step 400
400
#969CD1
oklch(70.7% 0.078 279.2)
-
Step 500
500
#7D83C4
oklch(63.1% 0.098 279.2)
-
Step 600
600
#676BB1
oklch(55.6% 0.108 279.8)
-
Step 700
700
#555998
oklch(49% 0.1 279.3)
-
Step 800
800
#46497B
oklch(42.6% 0.082 279.7)
-
Step 900
900
#3A3D63
oklch(37.5% 0.065 279.3)
-
Step 950
950 (this color)
#23253B
oklch(27.3% 0.041 279.3)
#23253B 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) | #1E283C | 0.012 |
| Deuteranopia (no green cones) | #1D263A | 0.010 |
| Tritanopia (no blue cones) | #1C292D | 0.036 |
| Achromatopsia (no color) | #272727 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23253B
#23253B
oklch(27.3% 0.041 279.3)
- #2C280E
#2C280E
oklch(27.4% 0.042 100.7)
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 #23253B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.013
- Dark #1B2431 ΔE 0.024
- Space Cadet #2B2D42 ΔE 0.032
- Jet #212529 ΔE 0.035
- Gunmetal #293241 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.064
- Marine #042E60 ΔE 0.072
Use #23253B 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.