#05122F
Closest named color: Rich Black (#0D1B2A). oklch(19.1% 0.061 262.6), rgb(5, 18, 47).
Aa
White text reads best on this color (18.51:1).
About this color
#05122F is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.061 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 18.51:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.51:1 |
Values
| HEX | #05122F |
| RGB | rgb(5, 18, 47) |
| HSL | hsl(221, 81%, 10%) |
| OKLCH | oklch(19.1% 0.061 262.6) |
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 #05122F | 18.51:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #05122F | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #05122F text on white | 18.51:1 | AAA | Lc 104.9 | Preferred for body text |
| #05122F text on black | 1.13:1 | 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
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F0
oklch(80.9% 0.072 262.9)
-
Step 400
400
#79A0E9
oklch(70.7% 0.116 262.3)
-
Step 500
500
#5786E3
oklch(63.1% 0.15 262.7)
-
Step 600
600
#3D6ED0
oklch(55.6% 0.161 262.4)
-
Step 700
700
#305BB5
oklch(49.1% 0.151 262.9)
-
Step 800
800
#284B92
oklch(42.7% 0.124 262.6)
-
Step 900
900
#253F74
oklch(37.6% 0.096 262.9)
-
Step 950
950 (this color)
#05122F
oklch(19.1% 0.061 262.6)
#05122F 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) | #031530 | 0.010 |
| Deuteranopia (no green cones) | #00122E | 0.009 |
| Tritanopia (no blue cones) | #00191E | 0.048 |
| Achromatopsia (no color) | #131313 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05122F
#05122F
oklch(19.1% 0.061 262.6)
- #1D1200
#1D1200
oklch(19.2% 0.04 81.7)
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 #05122F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Navy Blue #001146 ΔE 0.045
- Dark Navy #000435 ΔE 0.046
- Rich Navy #001219 ΔE 0.048
- Dark Navy Blue #00022E ΔE 0.056
- Midnight #03012D ΔE 0.057
- Very Dark Blue #000133 ΔE 0.057
- Night Blue #040348 ΔE 0.059
Use #05122F 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.