#040308
Closest named color: Almost Black (#070D0D). oklch(10.4% 0.017 294.8), rgb(4, 3, 8).
Aa
White text reads best on this color (20.55:1).
About this color
#040308 is a very dark close to neutral grey. In OKLCH its lightness is 10%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Almost Black (#070D0D), ΔE 0.053 away. White text reads best on it, at 20.55:1.
| Hue family | Neutrals |
| Lightness | very dark (10%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.02:1 |
| White text | 20.55:1 |
Values
| HEX | #040308 |
| RGB | rgb(4, 3, 8) |
| HSL | hsl(252, 45%, 2%) |
| OKLCH | oklch(10.4% 0.017 294.8) |
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 #040308 | 20.55:1 | AAA | Lc -107.9 | Preferred for body text |
| Black text on #040308 | 1.02:1 | Fails | Lc 0.0 | Not readable |
| #040308 text on white | 20.55:1 | AAA | Lc 106.0 | Preferred for body text |
| #040308 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#D9D8E0
oklch(88.5% 0.011 291.9)
-
Step 300
300
#C1BECD
oklch(80.9% 0.021 295.1)
-
Step 400
400
#A19DB3
oklch(70.7% 0.032 293.9)
-
Step 500
500
#8B85A1
oklch(63.2% 0.042 295)
-
Step 600
600
#756E8C
oklch(55.6% 0.047 295.5)
-
Step 700
700
#625C77
oklch(49.1% 0.043 294.9)
-
Step 800
800
#504B60
oklch(42.6% 0.035 295.8)
-
Step 900
900
#423F4F
oklch(37.7% 0.027 293.6)
-
Step 950
950 (this color)
#040308
oklch(10.4% 0.017 294.8)
#040308 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) | #020408 | 0.011 |
| Deuteranopia (no green cones) | #020408 | 0.011 |
| Tritanopia (no blue cones) | #030405 | 0.015 |
| Achromatopsia (no color) | #040404 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040308
#040308
oklch(10.4% 0.017 294.8)
- #040401
#040401
oklch(10.4% 0.015 108.7)
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 #040308, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.053
- Rich Navy #001219 ΔE 0.072
- Very Dark Brown #1D0200 ΔE 0.076
- Midnight #03012D ΔE 0.082
- Dark Navy Blue #00022E ΔE 0.085
- Very Dark Blue #000133 ΔE 0.095
- Dark Navy #000435 ΔE 0.098
- Black #000000 ΔE 0.106
Use #040308 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.