#05121B
Closest named color: Rich Navy (#001219). oklch(17.5% 0.027 239), rgb(5, 18, 27).
Aa
White text reads best on this color (18.93:1).
About this color
#05121B is a very dark close to neutral grey. In OKLCH its lightness is 17%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.011 away. White text reads best on it, at 18.93:1.
| Hue family | Neutrals |
| Lightness | very dark (17%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 18.93:1 |
Values
| HEX | #05121B |
| RGB | rgb(5, 18, 27) |
| HSL | hsl(205, 69%, 6%) |
| OKLCH | oklch(17.5% 0.027 239) |
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 #05121B | 18.93:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #05121B | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #05121B text on white | 18.93:1 | AAA | Lc 105.3 | Preferred for body text |
| #05121B text on black | 1.10:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D3
oklch(80.9% 0.031 238.9)
-
Step 400
400
#84A6BE
oklch(70.8% 0.051 239.2)
-
Step 500
500
#648FAD
oklch(63% 0.065 239.6)
-
Step 600
600
#4A7999
oklch(55.6% 0.072 239.6)
-
Step 700
700
#3B6682
oklch(49.1% 0.066 238.6)
-
Step 800
800
#31536A
oklch(42.6% 0.055 239.5)
-
Step 900
900
#2C4556
oklch(37.8% 0.042 239.1)
-
Step 950
950 (this color)
#05121B
oklch(17.5% 0.027 239)
#05121B 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) | #0E121B | 0.015 |
| Deuteranopia (no green cones) | #0B101B | 0.012 |
| Tritanopia (no blue cones) | #001415 | 0.020 |
| Achromatopsia (no color) | #111111 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05121B
#05121B
oklch(17.5% 0.027 239)
- #190D05
#190D05
oklch(17.4% 0.027 56.8)
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 #05121B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.011
- Almost Black #070D0D ΔE 0.031
- Rich Black #0D1B2A ΔE 0.044
- Dark Navy #000435 ΔE 0.074
- Dark Navy Blue #00022E ΔE 0.074
- Midnight #03012D ΔE 0.074
- Very Dark Blue #000133 ΔE 0.079
- Very Dark Brown #1D0200 ΔE 0.083
Use #05121B 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.