#1C1539
Closest named color: Rich Black (#0D1B2A). oklch(22.7% 0.067 288.9), rgb(28, 21, 57).
Aa
White text reads best on this color (17.27:1).
About this color
#1C1539 is a very dark, muted purple. In OKLCH its lightness is 23%, its chroma 0.067 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 17.27:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.27:1 |
Values
| HEX | #1C1539 |
| RGB | rgb(28, 21, 57) |
| HSL | hsl(252, 46%, 15%) |
| OKLCH | oklch(22.7% 0.067 288.9) |
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 #1C1539 | 17.27:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #1C1539 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #1C1539 text on white | 17.27:1 | AAA | Lc 104.0 | Preferred for body text |
| #1C1539 text on black | 1.21:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F1
oklch(80.9% 0.079 288.6)
-
Step 400
400
#9E92EB
oklch(70.6% 0.128 288.9)
-
Step 500
500
#8875E4
oklch(63.1% 0.162 288.8)
-
Step 600
600
#735BD2
oklch(55.7% 0.176 288.6)
-
Step 700
700
#614AB6
oklch(49.2% 0.164 288.7)
-
Step 800
800
#4F3D93
oklch(42.7% 0.136 289)
-
Step 900
900
#413575
oklch(37.6% 0.106 288.9)
-
Step 950
950 (this color)
#1C1539
oklch(22.7% 0.067 288.9)
#1C1539 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) | #041C3A | 0.038 |
| Deuteranopia (no green cones) | #051A38 | 0.036 |
| Tritanopia (no blue cones) | #131D24 | 0.056 |
| Achromatopsia (no color) | #1B1B1B | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1539
#1C1539
oklch(22.7% 0.067 288.9)
- #1E1E00
#1E1E00
oklch(22.8% 0.05 109.8)
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 #1C1539, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.045
- Midnight Purple #280137 ΔE 0.052
- Navy Blue #001146 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.055
- Dark #1B2431 ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.055
- Dark Indigo #1F0954 ΔE 0.056
- Dark Purple #35063E ΔE 0.062
Use #1C1539 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.