#05122C
Closest named color: Rich Black (#0D1B2A). oklch(18.8% 0.056 261.4), rgb(5, 18, 44).
Aa
White text reads best on this color (18.59:1).
About this color
#05122C is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.056 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.037 away. White text reads best on it, at 18.59:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.59:1 |
Values
| HEX | #05122C |
| RGB | rgb(5, 18, 44) |
| HSL | hsl(220, 80%, 10%) |
| OKLCH | oklch(18.8% 0.056 261.4) |
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 #05122C | 18.59:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #05122C | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #05122C text on white | 18.59:1 | AAA | Lc 105.0 | Preferred for body text |
| #05122C text on black | 1.12:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#A9C2EC
oklch(81% 0.066 260.7)
-
Step 400
400
#7BA1E3
oklch(70.8% 0.106 261.1)
-
Step 500
500
#5A88DB
oklch(63.2% 0.135 261.4)
-
Step 600
600
#3F70C9
oklch(55.7% 0.148 261.3)
-
Step 700
700
#315DAD
oklch(49% 0.137 261.2)
-
Step 800
800
#2A4C8C
oklch(42.6% 0.113 261.8)
-
Step 900
900
#264070
oklch(37.7% 0.089 261.6)
-
Step 950
950 (this color)
#05122C
oklch(18.8% 0.056 261.4)
#05122C 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) | #05152D | 0.010 |
| Deuteranopia (no green cones) | #00112B | 0.011 |
| Tritanopia (no blue cones) | #00181C | 0.045 |
| Achromatopsia (no color) | #131313 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05122C
#05122C
oklch(18.8% 0.056 261.4)
- #1C1100
#1C1100
oklch(18.8% 0.039 80.8)
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 #05122C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.037
- Rich Navy #001219 ΔE 0.042
- Dark Navy #000435 ΔE 0.049
- Navy Blue #001146 ΔE 0.051
- Dark Navy Blue #00022E ΔE 0.056
- Midnight #03012D ΔE 0.057
- Very Dark Blue #000133 ΔE 0.058
- Almost Black #070D0D ΔE 0.064
Use #05122C 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.