#010819
Closest named color: Rich Navy (#001219). oklch(13.7% 0.041 257.4), rgb(1, 8, 25).
Aa
White text reads best on this color (19.99:1).
About this color
#010819 is a very dark, muted blue. In OKLCH its lightness is 14%, its chroma 0.041 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.040 away. White text reads best on it, at 19.99:1.
| Hue family | Blues |
| Lightness | very dark (14%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.05:1 |
| White text | 19.99:1 |
Values
| HEX | #010819 |
| RGB | rgb(1, 8, 25) |
| HSL | hsl(223, 92%, 5%) |
| OKLCH | oklch(13.7% 0.041 257.4) |
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 #010819 | 19.99:1 | AAA | Lc -107.7 | Preferred for body text |
| Black text on #010819 | 1.05:1 | Fails | Lc 0.0 | Not readable |
| #010819 text on white | 19.99:1 | AAA | Lc 105.8 | Preferred for body text |
| #010819 text on black | 1.05:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E1
oklch(80.8% 0.05 258)
-
Step 400
400
#82A2D2
oklch(70.6% 0.079 258.3)
-
Step 500
500
#628BC6
oklch(63.2% 0.1 257.5)
-
Step 600
600
#4874B2
oklch(55.6% 0.109 257.1)
-
Step 700
700
#3A6199
oklch(49.1% 0.101 257.5)
-
Step 800
800
#304F7C
oklch(42.6% 0.084 257.7)
-
Step 900
900
#2B4264
oklch(37.7% 0.065 258)
-
Step 950
950 (this color)
#010819
oklch(13.7% 0.041 257.4)
#010819 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) | #020A1A | 0.009 |
| Deuteranopia (no green cones) | #000719 | 0.006 |
| Tritanopia (no blue cones) | #000C0F | 0.031 |
| Achromatopsia (no color) | #080808 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #010819
#010819
oklch(13.7% 0.041 257.4)
- #0F0700
#0F0700
oklch(13.7% 0.029 77.4)
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 #010819, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.040
- Almost Black #070D0D ΔE 0.041
- Midnight #03012D ΔE 0.049
- Dark Navy Blue #00022E ΔE 0.049
- Very Dark Blue #000133 ΔE 0.059
- Dark Navy #000435 ΔE 0.059
- Rich Black #0D1B2A ΔE 0.081
- Very Dark Brown #1D0200 ΔE 0.090
Use #010819 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.