#20243B
Closest named color: Oxford Blue (#1B263B). oklch(26.8% 0.043 275.6), rgb(32, 36, 59).
Aa
White text reads best on this color (15.25:1).
About this color
#20243B is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.043 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.010 away. White text reads best on it, at 15.25:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.25:1 |
Values
| HEX | #20243B |
| RGB | rgb(32, 36, 59) |
| HSL | hsl(231, 30%, 18%) |
| OKLCH | oklch(26.8% 0.043 275.6) |
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 #20243B | 15.25:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #20243B | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #20243B text on white | 15.25:1 | AAA | Lc 102.1 | Preferred for body text |
| #20243B text on black | 1.37:1 | 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
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B7BFE2
oklch(81% 0.05 275.1)
-
Step 400
400
#929DD4
oklch(70.8% 0.082 275.4)
-
Step 500
500
#7884C9
oklch(63.2% 0.105 275.5)
-
Step 600
600
#616CB5
oklch(55.5% 0.114 275.6)
-
Step 700
700
#505A9C
oklch(49.1% 0.106 275.3)
-
Step 800
800
#424A7F
oklch(42.8% 0.088 275.5)
-
Step 900
900
#373E66
oklch(37.7% 0.069 275.1)
-
Step 950
950 (this color)
#20243B
oklch(26.8% 0.043 275.6)
#20243B 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) | #1C273C | 0.011 |
| Deuteranopia (no green cones) | #1A243A | 0.010 |
| Tritanopia (no blue cones) | #18292C | 0.040 |
| Achromatopsia (no color) | #252525 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #20243B
#20243B
oklch(26.8% 0.043 275.6)
- #2C260A
#2C260A
oklch(26.8% 0.044 97.2)
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 #20243B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.010
- Dark #1B2431 ΔE 0.021
- Jet #212529 ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.037
- Gunmetal #293241 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.067
- Marine #042E60 ΔE 0.072
Use #20243B 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.