#23243B
Closest named color: Oxford Blue (#1B263B). oklch(27.1% 0.043 281.2), rgb(35, 36, 59).
Aa
White text reads best on this color (15.14:1).
About this color
#23243B is a dark, muted purple. In OKLCH its lightness is 27%, its chroma 0.043 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.014 away. White text reads best on it, at 15.14:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.14:1 |
Values
| HEX | #23243B |
| RGB | rgb(35, 36, 59) |
| HSL | hsl(238, 26%, 18%) |
| OKLCH | oklch(27.1% 0.043 281.2) |
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 #23243B | 15.14:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #23243B | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #23243B text on white | 15.14:1 | AAA | Lc 102.0 | Preferred for body text |
| #23243B text on black | 1.38:1 | 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
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D5D7EC
oklch(88.4% 0.029 281.5)
-
Step 300
300
#BABDE1
oklch(80.8% 0.051 281.4)
-
Step 400
400
#979BD2
oklch(70.7% 0.08 280.9)
-
Step 500
500
#7F82C6
oklch(63.2% 0.102 281.1)
-
Step 600
600
#696AB3
oklch(55.6% 0.112 281.5)
-
Step 700
700
#57589A
oklch(49.1% 0.104 281.2)
-
Step 800
800
#47487D
oklch(42.6% 0.087 281.2)
-
Step 900
900
#3C3D64
oklch(37.8% 0.066 281.6)
-
Step 950
950 (this color)
#23243B
oklch(27.1% 0.043 281.2)
#23243B 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 | 0.013 |
| Deuteranopia (no green cones) | #1C253A | 0.012 |
| Tritanopia (no blue cones) | #1C282C | 0.037 |
| Achromatopsia (no color) | #262626 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23243B
#23243B
oklch(27.1% 0.043 281.2)
- #2B270C
#2B270C
oklch(27% 0.043 101)
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 #23243B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.014
- Dark #1B2431 ΔE 0.024
- Space Cadet #2B2D42 ΔE 0.034
- Jet #212529 ΔE 0.036
- Gunmetal #293241 ΔE 0.048
- Rich Black #0D1B2A ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.066
- Marine #042E60 ΔE 0.073
Use #23243B 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.