#000510
Closest named color: Almost Black (#070D0D). oklch(11.4% 0.033 250.8), rgb(0, 5, 16).
Aa
White text reads best on this color (20.40:1).
About this color
#000510 is a very dark, muted blue. In OKLCH its lightness is 11%, its chroma 0.033 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Almost Black (#070D0D), ΔE 0.048 away. White text reads best on it, at 20.40:1.
| Hue family | Blues |
| Lightness | very dark (11%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.02:1 |
| White text | 20.40:1 |
Values
| HEX | #000510 |
| RGB | rgb(0, 5, 16) |
| HSL | hsl(221, 100%, 3%) |
| OKLCH | oklch(11.4% 0.033 250.8) |
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 #000510 | 20.40:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #000510 | 1.02:1 | Fails | Lc 0.0 | Not readable |
| #000510 text on white | 20.40:1 | AAA | Lc 106.0 | Preferred for body text |
| #000510 text on black | 1.02:1 | 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
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#84A4C7
oklch(70.7% 0.063 251)
-
Step 500
500
#658DB8
oklch(63.1% 0.079 250.9)
-
Step 600
600
#4B77A4
oklch(55.7% 0.086 250.1)
-
Step 700
700
#3C648D
oklch(49.2% 0.08 250.3)
-
Step 800
800
#325172
oklch(42.6% 0.066 251)
-
Step 900
900
#2C435C
oklch(37.5% 0.052 251.3)
-
Step 950
950 (this color)
#000510
oklch(11.4% 0.033 250.8)
#000510 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) | #020610 | 0.011 |
| Deuteranopia (no green cones) | #000410 | 0.006 |
| Tritanopia (no blue cones) | #000709 | 0.022 |
| Achromatopsia (no color) | #050505 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #000510
#000510
oklch(11.4% 0.033 250.8)
- #0A0400
#0A0400
oklch(11.6% 0.025 73.1)
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 #000510, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.048
- Rich Navy #001219 ΔE 0.058
- Midnight #03012D ΔE 0.065
- Dark Navy Blue #00022E ΔE 0.065
- Very Dark Blue #000133 ΔE 0.075
- Dark Navy #000435 ΔE 0.079
- Very Dark Brown #1D0200 ΔE 0.091
- Rich Black #0D1B2A ΔE 0.104
Use #000510 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.