#100F25
Closest named color: Rich Black (#0D1B2A). oklch(18.3% 0.044 283.2), rgb(16, 15, 37).
Aa
White text reads best on this color (18.79:1).
About this color
#100F25 is a very dark, muted purple. In OKLCH its lightness is 18%, its chroma 0.044 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 18.79:1.
| Hue family | Purples |
| Lightness | very dark (18%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.11:1 |
| White text | 18.79:1 |
Values
| HEX | #100F25 |
| RGB | rgb(16, 15, 37) |
| HSL | hsl(243, 42%, 10%) |
| OKLCH | oklch(18.3% 0.044 283.2) |
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 #100F25 | 18.79:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #100F25 | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #100F25 text on white | 18.79:1 | AAA | Lc 105.2 | Preferred for body text |
| #100F25 text on black | 1.11:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7EC
oklch(88.5% 0.029 283.6)
-
Step 300
300
#BBBDE2
oklch(80.9% 0.052 282.7)
-
Step 400
400
#999AD4
oklch(70.7% 0.084 283.3)
-
Step 500
500
#8180C8
oklch(63.1% 0.107 283.5)
-
Step 600
600
#6B69B5
oklch(55.7% 0.116 283.2)
-
Step 700
700
#59579B
oklch(49.1% 0.107 283)
-
Step 800
800
#49477E
oklch(42.6% 0.09 283.6)
-
Step 900
900
#3D3C65
oklch(37.7% 0.069 283.7)
-
Step 950
950 (this color)
#100F25
oklch(18.3% 0.044 283.2)
#100F25 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) | #071226 | 0.017 |
| Deuteranopia (no green cones) | #061125 | 0.018 |
| Tritanopia (no blue cones) | #091418 | 0.038 |
| Achromatopsia (no color) | #121212 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100F25
#100F25
oklch(18.3% 0.044 283.2)
- #151300
#151300
oklch(18.3% 0.039 104.9)
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 #100F25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Rich Navy #001219 ΔE 0.042
- Almost Black #070D0D ΔE 0.054
- Dark Navy #000435 ΔE 0.061
- Midnight #03012D ΔE 0.062
- Dark Navy Blue #00022E ΔE 0.064
- Very Dark Blue #000133 ΔE 0.068
- Navy Blue #001146 ΔE 0.068
Use #100F25 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.