#040510
Closest named color: Almost Black (#070D0D). oklch(12.1% 0.027 275.8), rgb(4, 5, 16).
Aa
White text reads best on this color (20.30:1).
About this color
#040510 is a very dark close to neutral grey. In OKLCH its lightness is 12%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.041 away. White text reads best on it, at 20.30:1.
| Hue family | Neutrals |
| Lightness | very dark (12%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.03:1 |
| White text | 20.30:1 |
Values
| HEX | #040510 |
| RGB | rgb(4, 5, 16) |
| HSL | hsl(235, 60%, 4%) |
| OKLCH | oklch(12.1% 0.027 275.8) |
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 #040510 | 20.30:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #040510 | 1.03:1 | Fails | Lc 0.0 | Not readable |
| #040510 text on white | 20.30:1 | AAA | Lc 106.0 | Preferred for body text |
| #040510 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D5D8E5
oklch(88.4% 0.018 275.6)
-
Step 300
300
#BABFD6
oklch(80.8% 0.033 275.9)
-
Step 400
400
#979EC1
oklch(70.6% 0.052 276.1)
-
Step 500
500
#7E86B2
oklch(63% 0.067 276.3)
-
Step 600
600
#67709E
oklch(55.6% 0.072 275.3)
-
Step 700
700
#565D87
oklch(49% 0.068 276.3)
-
Step 800
800
#464C6D
oklch(42.5% 0.055 275.9)
-
Step 900
900
#3B4059
oklch(37.8% 0.043 275.4)
-
Step 950
950 (this color)
#040510
oklch(12.1% 0.027 275.8)
#040510 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 | 0.008 |
| Deuteranopia (no green cones) | #020510 | 0.007 |
| Tritanopia (no blue cones) | #020709 | 0.023 |
| Achromatopsia (no color) | #060606 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040510
#040510
oklch(12.1% 0.027 275.8)
- #080600
#080600
oklch(12.2% 0.025 99.3)
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 #040510, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.041
- Rich Navy #001219 ΔE 0.055
- Midnight #03012D ΔE 0.064
- Dark Navy Blue #00022E ΔE 0.067
- Very Dark Blue #000133 ΔE 0.077
- Very Dark Brown #1D0200 ΔE 0.077
- Dark Navy #000435 ΔE 0.079
- Rich Black #0D1B2A ΔE 0.098
Use #040510 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.