#23183B
Closest named color: Oxford Blue (#1B263B). oklch(24.3% 0.065 295.7), rgb(35, 24, 59).
Aa
White text reads best on this color (16.59:1).
About this color
#23183B is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.065 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 16.59:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.065) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.26:1 |
| White text | 16.59:1 |
Values
| HEX | #23183B |
| RGB | rgb(35, 24, 59) |
| HSL | hsl(259, 42%, 16%) |
| OKLCH | oklch(24.3% 0.065 295.7) |
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 #23183B | 16.59:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #23183B | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #23183B text on white | 16.59:1 | AAA | Lc 103.4 | Preferred for body text |
| #23183B text on black | 1.26:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F8
oklch(93.6% 0.023 296.7)
-
Step 200
200
#DBD4F3
oklch(88.5% 0.043 295.9)
-
Step 300
300
#C4B7EE
oklch(80.9% 0.078 295.4)
-
Step 400
400
#A790E5
oklch(70.7% 0.124 295.5)
-
Step 500
500
#9372DD
oklch(63.1% 0.158 295.8)
-
Step 600
600
#7E58CA
oklch(55.6% 0.17 295.7)
-
Step 700
700
#6A47AF
oklch(49.1% 0.159 295.5)
-
Step 800
800
#573B8E
oklch(42.8% 0.132 295.9)
-
Step 900
900
#473371
oklch(37.6% 0.103 295.9)
-
Step 950
950 (this color)
#23183B
oklch(24.3% 0.065 295.7)
#23183B 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) | #0B1F3C | 0.041 |
| Deuteranopia (no green cones) | #0D1E3A | 0.039 |
| Tritanopia (no blue cones) | #1D1F26 | 0.053 |
| Achromatopsia (no color) | #1E1E1E | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23183B
#23183B
oklch(24.3% 0.065 295.7)
- #1F2300
#1F2300
oklch(24.4% 0.056 115.9)
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 #23183B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.053
- Dark Purple #35063E ΔE 0.053
- Midnight Purple #280137 ΔE 0.056
- Eggplant #380835 ΔE 0.056
- Very Dark Purple #2A0134 ΔE 0.057
- Dark Indigo #1F0954 ΔE 0.059
Use #23183B 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.