#040A27
Closest named color: Midnight (#03012D). oklch(16.1% 0.061 267.7), rgb(4, 10, 39).
Aa
White text reads best on this color (19.48:1).
About this color
#040A27 is a very dark, muted blue. In OKLCH its lightness is 16%, its chroma 0.061 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight (#03012D), ΔE 0.033 away. White text reads best on it, at 19.48:1.
| Hue family | Blues |
| Lightness | very dark (16%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Midnight (#03012D) |
| Black text | 1.07:1 |
| White text | 19.48:1 |
Values
| HEX | #040A27 |
| RGB | rgb(4, 10, 39) |
| HSL | hsl(230, 81%, 8%) |
| OKLCH | oklch(16.1% 0.061 267.7) |
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 #040A27 | 19.48:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #040A27 | 1.07:1 | Fails | Lc 0.0 | Not readable |
| #040A27 text on white | 19.48:1 | AAA | Lc 105.5 | Preferred for body text |
| #040A27 text on black | 1.07:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#819EE9
oklch(70.8% 0.115 267.3)
-
Step 500
500
#6383E2
oklch(63% 0.148 268)
-
Step 600
600
#4B6BD0
oklch(55.7% 0.16 267.7)
-
Step 700
700
#3C59B4
oklch(49.2% 0.148 267.4)
-
Step 800
800
#324992
oklch(42.8% 0.123 267.8)
-
Step 900
900
#2B3E74
oklch(37.8% 0.095 267.2)
-
Step 950
950 (this color)
#040A27
oklch(16.1% 0.061 267.7)
#040A27 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) | #000E28 | 0.014 |
| Deuteranopia (no green cones) | #000B26 | 0.010 |
| Tritanopia (no blue cones) | #001116 | 0.048 |
| Achromatopsia (no color) | #0D0D0D | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040A27
#040A27
oklch(16.1% 0.061 267.7)
- #130C00
#130C00
oklch(15.9% 0.033 87.5)
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 #040A27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight #03012D ΔE 0.033
- Dark Navy Blue #00022E ΔE 0.034
- Dark Navy #000435 ΔE 0.035
- Very Dark Blue #000133 ΔE 0.040
- Rich Navy #001219 ΔE 0.045
- Almost Black #070D0D ΔE 0.059
- Rich Black #0D1B2A ΔE 0.063
- Navy Blue #001146 ΔE 0.065
Use #040A27 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.