#231B53
Closest named color: Dark Indigo (#1F0954). oklch(26.9% 0.098 284.2), rgb(35, 27, 83).
Aa
White text reads best on this color (15.51:1).
About this color
#231B53 is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.098 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.039 away. White text reads best on it, at 15.51:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.35:1 |
| White text | 15.51:1 |
Values
| HEX | #231B53 |
| RGB | rgb(35, 27, 83) |
| HSL | hsl(249, 51%, 22%) |
| OKLCH | oklch(26.9% 0.098 284.2) |
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 #231B53 | 15.51:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #231B53 | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #231B53 text on white | 15.51:1 | AAA | Lc 102.2 | Preferred for body text |
| #231B53 text on black | 1.35:1 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FF
oklch(93.7% 0.031 283.8)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#9690FF
oklch(70.7% 0.159 284)
-
Step 500
500
#806FFF
oklch(63.2% 0.206 284.2)
-
Step 600
600
#6D45FF
oklch(55.6% 0.256 284.2)
-
Step 700
700
#5C33DF
oklch(49.1% 0.239 284.2)
-
Step 800
800
#4B2DB4
oklch(42.7% 0.198 284.5)
-
Step 900
900
#3D2C8E
oklch(37.7% 0.154 284.2)
-
Step 950
950 (this color)
#231B53
oklch(26.9% 0.098 284.2)
#231B53 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) | #002655 | 0.047 |
| Deuteranopia (no green cones) | #002252 | 0.045 |
| Tritanopia (no blue cones) | #0F2834 | 0.081 |
| Achromatopsia (no color) | #242424 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B53
#231B53
oklch(26.9% 0.098 284.2)
- #2B2700
#2B2700
oklch(26.9% 0.057 103.7)
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 #231B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.039
- Midnight Blue #191970 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.060
- Marine #042E60 ΔE 0.061
- Dark Purple #35063E ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.070
- Navy Blue #001146 ΔE 0.070
- Darkblue #030764 ΔE 0.073
Use #231B53 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.