#010C21
Closest named color: Rich Navy (#001219). oklch(15.7% 0.049 256.7), rgb(1, 12, 33).
Aa
White text reads best on this color (19.51:1).
About this color
#010C21 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.049 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.031 away. White text reads best on it, at 19.51:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.07:1 |
| White text | 19.51:1 |
Values
| HEX | #010C21 |
| RGB | rgb(1, 12, 33) |
| HSL | hsl(219, 94%, 7%) |
| OKLCH | oklch(15.7% 0.049 256.7) |
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 #010C21 | 19.51:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #010C21 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #010C21 text on white | 19.51:1 | AAA | Lc 105.6 | Preferred for body text |
| #010C21 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C3E7
oklch(81% 0.058 256.6)
-
Step 400
400
#7BA3DA
oklch(70.8% 0.092 256.5)
-
Step 500
500
#588BD0
oklch(63.1% 0.118 256.3)
-
Step 600
600
#3D73BE
oklch(55.5% 0.131 257.1)
-
Step 700
700
#2F60A4
oklch(49% 0.122 257.2)
-
Step 800
800
#284F84
oklch(42.7% 0.099 256.7)
-
Step 900
900
#25426A
oklch(37.7% 0.077 256.8)
-
Step 950
950 (this color)
#010C21
oklch(15.7% 0.049 256.7)
#010C21 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) | #030E22 | 0.010 |
| Deuteranopia (no green cones) | #000B21 | 0.005 |
| Tritanopia (no blue cones) | #001114 | 0.038 |
| Achromatopsia (no color) | #0C0C0C | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #010C21
#010C21
oklch(15.7% 0.049 256.7)
- #140A00
#140A00
oklch(15.5% 0.033 76.4)
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 #010C21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.031
- Dark Navy Blue #00022E ΔE 0.044
- Midnight #03012D ΔE 0.044
- Almost Black #070D0D ΔE 0.045
- Dark Navy #000435 ΔE 0.047
- Very Dark Blue #000133 ΔE 0.051
- Rich Black #0D1B2A ΔE 0.062
- Navy Blue #001146 ΔE 0.076
Use #010C21 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.