#00101C
Closest named color: Rich Navy (#001219). oklch(16.4% 0.037 238.2), rgb(0, 16, 28).
Aa
White text reads best on this color (19.25:1).
About this color
#00101C is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.037 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.012 away. White text reads best on it, at 19.25:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.25:1 |
Values
| HEX | #00101C |
| RGB | rgb(0, 16, 28) |
| HSL | hsl(206, 100%, 5%) |
| OKLCH | oklch(16.4% 0.037 238.2) |
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 #00101C | 19.25:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #00101C | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #00101C text on white | 19.25:1 | AAA | Lc 105.5 | Preferred for body text |
| #00101C text on black | 1.09:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A8C5DA
oklch(80.9% 0.043 239.6)
-
Step 400
400
#77A7C7
oklch(70.6% 0.07 238.2)
-
Step 500
500
#5291B9
oklch(63.1% 0.089 238.2)
-
Step 600
600
#347BA5
oklch(55.7% 0.096 238)
-
Step 700
700
#26678D
oklch(49% 0.089 238.3)
-
Step 800
800
#215473
oklch(42.6% 0.075 238.8)
-
Step 900
900
#21465D
oklch(37.8% 0.058 238.2)
-
Step 950
950 (this color)
#00101C
oklch(16.4% 0.037 238.2)
#00101C 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) | #0A101D | 0.019 |
| Deuteranopia (no green cones) | #060D1C | 0.016 |
| Tritanopia (no blue cones) | #001314 | 0.024 |
| Achromatopsia (no color) | #0E0E0E | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00101C
#00101C
oklch(16.4% 0.037 238.2)
- #1A0A01
#1A0A01
oklch(16.6% 0.036 57.8)
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 #00101C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.012
- Almost Black #070D0D ΔE 0.032
- Rich Black #0D1B2A ΔE 0.054
- Dark Navy Blue #00022E ΔE 0.063
- Midnight #03012D ΔE 0.064
- Dark Navy #000435 ΔE 0.065
- Very Dark Blue #000133 ΔE 0.069
- Navy Blue #001146 ΔE 0.084
Use #00101C 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.