#100A15
Closest named color: Almost Black (#070D0D). oklch(15.9% 0.025 308.8), rgb(16, 10, 21).
Aa
White text reads best on this color (19.51:1).
About this color
#100A15 is a very dark close to neutral grey. In OKLCH its lightness is 16%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.031 away. White text reads best on it, at 19.51:1.
| Hue family | Neutrals |
| Lightness | very dark (16%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.07:1 |
| White text | 19.51:1 |
Values
| HEX | #100A15 |
| RGB | rgb(16, 10, 21) |
| HSL | hsl(273, 35%, 6%) |
| OKLCH | oklch(15.9% 0.025 308.8) |
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 #100A15 | 19.51:1 | AAA | Lc -107.6 | Preferred for body text |
| Black text on #100A15 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #100A15 text on white | 19.51:1 | AAA | Lc 105.7 | Preferred for body text |
| #100A15 text on black | 1.07:1 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE8EE
oklch(93.5% 0.009 308.4)
-
Step 200
200
#DCD6E1
oklch(88.4% 0.016 310.1)
-
Step 300
300
#C6BCCF
oklch(80.9% 0.028 309.2)
-
Step 400
400
#A999B7
oklch(70.7% 0.047 309.1)
-
Step 500
500
#9480A5
oklch(63.1% 0.059 309.2)
-
Step 600
600
#7E6990
oklch(55.5% 0.064 308.9)
-
Step 700
700
#6B577B
oklch(49.1% 0.061 309.5)
-
Step 800
800
#574864
oklch(42.8% 0.049 308.7)
-
Step 900
900
#473C51
oklch(37.6% 0.038 308.4)
-
Step 950
950 (this color)
#100A15
oklch(15.9% 0.025 308.8)
#100A15 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) | #080C15 | 0.018 |
| Deuteranopia (no green cones) | #090C15 | 0.016 |
| Tritanopia (no blue cones) | #0F0C0E | 0.019 |
| Achromatopsia (no color) | #0C0C0C | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100A15
#100A15
oklch(15.9% 0.025 308.8)
- #0A0F05
#0A0F05
oklch(15.9% 0.023 128.7)
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 #100A15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.031
- Rich Navy #001219 ΔE 0.040
- Very Dark Brown #1D0200 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.066
- Midnight #03012D ΔE 0.072
- Dark Navy Blue #00022E ΔE 0.076
- Dark Navy #000435 ΔE 0.080
- Very Dark Blue #000133 ΔE 0.083
Use #100A15 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.