#00051B
Closest named color: Midnight (#03012D). oklch(12.6% 0.053 260.5), rgb(0, 5, 27).
Aa
White text reads best on this color (20.24:1).
About this color
#00051B is a very dark, muted blue. In OKLCH its lightness is 13%, its chroma 0.053 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight (#03012D), ΔE 0.040 away. White text reads best on it, at 20.24:1.
| Hue family | Blues |
| Lightness | very dark (13%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Midnight (#03012D) |
| Black text | 1.03:1 |
| White text | 20.24:1 |
Values
| HEX | #00051B |
| RGB | rgb(0, 5, 27) |
| HSL | hsl(229, 100%, 5%) |
| OKLCH | oklch(12.6% 0.053 260.5) |
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 #00051B | 20.24:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #00051B | 1.03:1 | Fails | Lc 0.0 | Not readable |
| #00051B text on white | 20.24:1 | AAA | Lc 105.9 | Preferred for body text |
| #00051B text on black | 1.03:1 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#AAC2EA
oklch(81% 0.063 260.6)
-
Step 400
400
#7CA1DF
oklch(70.6% 0.1 260.4)
-
Step 500
500
#5B89D6
oklch(63.2% 0.127 260.2)
-
Step 600
600
#4171C4
oklch(55.6% 0.139 260.6)
-
Step 700
700
#335EA9
oklch(49.1% 0.129 260.7)
-
Step 800
800
#2B4D89
oklch(42.7% 0.107 260.9)
-
Step 900
900
#27416E
oklch(37.8% 0.084 260.7)
-
Step 950
950 (this color)
#00051B
oklch(12.6% 0.053 260.5)
#00051B 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) | #00081C | 0.014 |
| Deuteranopia (no green cones) | #00051B | 0.000 |
| Tritanopia (no blue cones) | #000A0E | 0.040 |
| Achromatopsia (no color) | #060606 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00051B
#00051B
oklch(12.6% 0.053 260.5)
- #0C0600
#0C0600
oklch(12.8% 0.026 81.9)
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 #00051B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight #03012D ΔE 0.040
- Dark Navy Blue #00022E ΔE 0.041
- Very Dark Blue #000133 ΔE 0.051
- Dark Navy #000435 ΔE 0.055
- Rich Navy #001219 ΔE 0.055
- Almost Black #070D0D ΔE 0.056
- Night Blue #040348 ΔE 0.093
- Rich Black #0D1B2A ΔE 0.094
Use #00051B 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.