#1B152A
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.041 295.9), rgb(27, 21, 42).
Aa
White text reads best on this color (17.68:1).
About this color
#1B152A is a very dark, muted purple. In OKLCH its lightness is 21%, its chroma 0.041 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.030 away. White text reads best on it, at 17.68:1.
| Hue family | Purples |
| Lightness | very dark (21%) |
| Chroma | muted (0.041) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.68:1 |
Values
| HEX | #1B152A |
| RGB | rgb(27, 21, 42) |
| HSL | hsl(257, 33%, 12%) |
| OKLCH | oklch(21.4% 0.041 295.9) |
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 #1B152A | 17.68:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #1B152A | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #1B152A text on white | 17.68:1 | AAA | Lc 104.5 | Preferred for body text |
| #1B152A text on black | 1.18:1 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EAE8F2
oklch(93.5% 0.014 295.3)
-
Step 200
200
#DAD6E9
oklch(88.5% 0.026 295.5)
-
Step 300
300
#C3BBDD
oklch(81% 0.048 296.1)
-
Step 400
400
#A497CC
oklch(70.7% 0.078 295.6)
-
Step 500
500
#8F7DBF
oklch(63.2% 0.099 296)
-
Step 600
600
#7965AB
oklch(55.6% 0.108 295.9)
-
Step 700
700
#665493
oklch(49.2% 0.1 295.7)
-
Step 800
800
#534577
oklch(42.7% 0.082 295.6)
-
Step 900
900
#453A60
oklch(37.7% 0.065 296.5)
-
Step 950
950 (this color)
#1B152A
oklch(21.4% 0.041 295.9)
#1B152A 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) | #0F192B | 0.024 |
| Deuteranopia (no green cones) | #101829 | 0.022 |
| Tritanopia (no blue cones) | #18191D | 0.034 |
| Achromatopsia (no color) | #181818 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B152A
#1B152A
oklch(21.4% 0.041 295.9)
- #181B04
#181B04
oklch(21.2% 0.04 115.9)
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 #1B152A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.030
- Dark #1B2431 ΔE 0.051
- Jet #212529 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.063
- Rich Navy #001219 ΔE 0.063
- Midnight Purple #280137 ΔE 0.063
- Navy Blue #001146 ΔE 0.072
Use #1B152A 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.