#1B102F
Closest named color: Rich Black (#0D1B2A). oklch(20.7% 0.06 297.3), rgb(27, 16, 47).
Aa
White text reads best on this color (18.07:1).
About this color
#1B102F is a very dark, muted purple. In OKLCH its lightness is 21%, its chroma 0.060 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.045 away. White text reads best on it, at 18.07:1.
| Hue family | Purples |
| Lightness | very dark (21%) |
| Chroma | muted (0.060) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.07:1 |
Values
| HEX | #1B102F |
| RGB | rgb(27, 16, 47) |
| HSL | hsl(261, 49%, 12%) |
| OKLCH | oklch(20.7% 0.06 297.3) |
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 #1B102F | 18.07:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #1B102F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #1B102F text on white | 18.07:1 | AAA | Lc 104.7 | Preferred for body text |
| #1B102F text on black | 1.16:1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F1
oklch(88.4% 0.04 296.6)
-
Step 300
300
#C5B8E9
oklch(81% 0.07 297)
-
Step 400
400
#A891DE
oklch(70.7% 0.113 297.2)
-
Step 500
500
#9474D5
oklch(63.1% 0.144 297.3)
-
Step 600
600
#7F5AC2
oklch(55.5% 0.157 297.5)
-
Step 700
700
#6B49A8
oklch(49% 0.147 297.2)
-
Step 800
800
#573D88
oklch(42.7% 0.121 297)
-
Step 900
900
#48356D
oklch(37.8% 0.094 297.4)
-
Step 950
950 (this color)
#1B102F
oklch(20.7% 0.06 297.3)
#1B102F 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) | #041630 | 0.041 |
| Deuteranopia (no green cones) | #07162E | 0.038 |
| Tritanopia (no blue cones) | #16161D | 0.046 |
| Achromatopsia (no color) | #161616 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B102F
#1B102F
oklch(20.7% 0.06 297.3)
- #161A00
#161A00
oklch(20.6% 0.048 117.2)
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 #1B102F, 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 0.047
- Very Dark Purple #2A0134 ΔE 0.048
- Navy Blue #001146 ΔE 0.063
- Dark #1B2431 ΔE 0.066
- Dark Purple #35063E ΔE 0.067
- Eggplant #380835 ΔE 0.068
- Rich Navy #001219 ΔE 0.071
Use #1B102F 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.