#040717
Closest named color: Almost Black (#070D0D). oklch(13.6% 0.037 269.9), rgb(4, 7, 23).
Aa
White text reads best on this color (20.03:1).
About this color
#040717 is a very dark, muted blue. In OKLCH its lightness is 14%, its chroma 0.037 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Almost Black (#070D0D), ΔE 0.039 away. White text reads best on it, at 20.03:1.
| Hue family | Blues |
| Lightness | very dark (14%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Almost Black (#070D0D) |
| Black text | 1.04:1 |
| White text | 20.03:1 |
Values
| HEX | #040717 |
| RGB | rgb(4, 7, 23) |
| HSL | hsl(231, 70%, 5%) |
| OKLCH | oklch(13.6% 0.037 269.9) |
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 #040717 | 20.03:1 | AAA | Lc -107.8 | Preferred for body text |
| Black text on #040717 | 1.04:1 | Fails | Lc 0.0 | Not readable |
| #040717 text on white | 20.03:1 | AAA | Lc 105.9 | Preferred for body text |
| #040717 text on black | 1.04:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D3D9EA
oklch(88.6% 0.024 270.3)
-
Step 300
300
#B5C0DD
oklch(80.9% 0.043 269)
-
Step 400
400
#8F9FCD
oklch(70.7% 0.07 269.7)
-
Step 500
500
#7487C0
oklch(63.1% 0.089 269.6)
-
Step 600
600
#5D70AC
oklch(55.6% 0.096 269.7)
-
Step 700
700
#4D5D94
oklch(49% 0.091 270.5)
-
Step 800
800
#3F4D78
oklch(42.8% 0.074 269.4)
-
Step 900
900
#354060
oklch(37.7% 0.057 269.1)
-
Step 950
950 (this color)
#040717
oklch(13.6% 0.037 269.9)
#040717 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) | #020918 | 0.009 |
| Deuteranopia (no green cones) | #010717 | 0.010 |
| Tritanopia (no blue cones) | #000A0D | 0.031 |
| Achromatopsia (no color) | #080808 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #040717
#040717
oklch(13.6% 0.037 269.9)
- #0D0800
#0D0800
oklch(13.8% 0.028 90.3)
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 #040717, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Almost Black #070D0D ΔE 0.039
- Rich Navy #001219 ΔE 0.043
- Midnight #03012D ΔE 0.052
- Dark Navy Blue #00022E ΔE 0.054
- Very Dark Blue #000133 ΔE 0.064
- Dark Navy #000435 ΔE 0.064
- Very Dark Brown #1D0200 ΔE 0.082
- Rich Black #0D1B2A ΔE 0.083
Use #040717 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.