#05121F
Closest named color: Rich Navy (#001219). oklch(17.8% 0.033 248.6), rgb(5, 18, 31).
Aa
White text reads best on this color (18.87:1).
About this color
#05121F is a very dark, muted blue. In OKLCH its lightness is 18%, its chroma 0.033 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.017 away. White text reads best on it, at 18.87:1.
| Hue family | Blues |
| Lightness | very dark (18%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.87:1 |
Values
| HEX | #05121F |
| RGB | rgb(5, 18, 31) |
| HSL | hsl(210, 72%, 7%) |
| OKLCH | oklch(17.8% 0.033 248.6) |
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 #05121F | 18.87:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #05121F | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #05121F text on white | 18.87:1 | AAA | Lc 105.3 | Preferred for body text |
| #05121F text on black | 1.11:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#ADC3DA
oklch(80.8% 0.041 249.5)
-
Step 400
400
#82A4C7
oklch(70.6% 0.064 249.5)
-
Step 500
500
#628EB8
oklch(63.2% 0.08 248.1)
-
Step 600
600
#4877A5
oklch(55.6% 0.089 249.2)
-
Step 700
700
#39648D
oklch(49.1% 0.082 248.8)
-
Step 800
800
#305272
oklch(42.7% 0.067 248.2)
-
Step 900
900
#2A445C
oklch(37.7% 0.052 247.5)
-
Step 950
950 (this color)
#05121F
oklch(17.8% 0.033 248.6)
#05121F 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) | #0C1320 | 0.013 |
| Deuteranopia (no green cones) | #09101F | 0.009 |
| Tritanopia (no blue cones) | #001517 | 0.025 |
| Achromatopsia (no color) | #111111 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05121F
#05121F
oklch(17.8% 0.033 248.6)
- #1A0E02
#1A0E02
oklch(17.7% 0.033 69.7)
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 #05121F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.017
- Almost Black #070D0D ΔE 0.038
- Rich Black #0D1B2A ΔE 0.040
- Dark Navy #000435 ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.068
- Midnight #03012D ΔE 0.068
- Very Dark Blue #000133 ΔE 0.073
- Navy Blue #001146 ΔE 0.078
Use #05121F 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.