#231B5A
Closest named color: Dark Indigo (#1F0954). oklch(27.6% 0.108 282.4), rgb(35, 27, 90).
Aa
White text reads best on this color (15.26:1).
About this color
#231B5A is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.108 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.040 away. White text reads best on it, at 15.26:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.37:1 |
| White text | 15.26:1 |
Values
| HEX | #231B5A |
| RGB | rgb(35, 27, 90) |
| HSL | hsl(248, 54%, 23%) |
| OKLCH | oklch(27.6% 0.108 282.4) |
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 #231B5A | 15.26:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #231B5A | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #231B5A text on white | 15.26:1 | AAA | Lc 101.8 | Preferred for body text |
| #231B5A 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D3D5FF
oklch(88.5% 0.058 283)
-
Step 300
300
#B7B9FF
oklch(80.9% 0.098 282.7)
-
Step 400
400
#9391FF
oklch(70.6% 0.158 282.4)
-
Step 500
500
#7C70FF
oklch(63.1% 0.205 282.6)
-
Step 600
600
#6948FF
oklch(55.6% 0.254 282.6)
-
Step 700
700
#5A26ED
oklch(49.1% 0.264 282.7)
-
Step 800
800
#4825C0
oklch(42.7% 0.219 282.2)
-
Step 900
900
#3B2797
oklch(37.7% 0.171 282.6)
-
Step 950
950 (this color)
#231B5A
oklch(27.6% 0.108 282.4)
#231B5A 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) | #00275C | 0.046 |
| Deuteranopia (no green cones) | #002359 | 0.044 |
| Tritanopia (no blue cones) | #072B37 | 0.092 |
| Achromatopsia (no color) | #252525 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B5A
#231B5A
oklch(27.6% 0.108 282.4)
- #2D2900
#2D2900
oklch(27.7% 0.058 103.9)
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 #231B5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.040
- Midnight Blue #191970 ΔE 0.043
- Marine #042E60 ΔE 0.057
- Darkblue #030764 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.070
- Dark Royal Blue #02066F ΔE 0.074
- Navy Blue #001146 ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.075
Use #231B5A 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.