#05122B
Closest named color: Rich Black (#0D1B2A). oklch(18.7% 0.054 260.9), rgb(5, 18, 43).
Aa
White text reads best on this color (18.61:1).
About this color
#05122B is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.054 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 18.61:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.61:1 |
Values
| HEX | #05122B |
| RGB | rgb(5, 18, 43) |
| HSL | hsl(219, 79%, 9%) |
| OKLCH | oklch(18.7% 0.054 260.9) |
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 #05122B | 18.61:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #05122B | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #05122B text on white | 18.61:1 | AAA | Lc 105.0 | Preferred for body text |
| #05122B 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7CA1E1
oklch(70.7% 0.103 261)
-
Step 500
500
#5A88D9
oklch(63.1% 0.133 261)
-
Step 600
600
#4070C6
oklch(55.5% 0.144 261.1)
-
Step 700
700
#325EAB
oklch(49.2% 0.133 260.7)
-
Step 800
800
#2A4D8B
oklch(42.8% 0.111 260.9)
-
Step 900
900
#26406F
oklch(37.6% 0.087 261.3)
-
Step 950
950 (this color)
#05122B
oklch(18.7% 0.054 260.9)
#05122B 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) | #05152C | 0.010 |
| Deuteranopia (no green cones) | #01112A | 0.009 |
| Tritanopia (no blue cones) | #00181C | 0.043 |
| Achromatopsia (no color) | #131313 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05122B
#05122B
oklch(18.7% 0.054 260.9)
- #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 #05122B, 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 0.040
- Dark Navy #000435 ΔE 0.050
- Navy Blue #001146 ΔE 0.053
- Dark Navy Blue #00022E ΔE 0.057
- Midnight #03012D ΔE 0.057
- Very Dark Blue #000133 ΔE 0.059
- Almost Black #070D0D ΔE 0.062
Use #05122B 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.