#041731
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.058 256.1), rgb(4, 23, 49).
Aa
White text reads best on this color (17.91:1).
About this color
#041731 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.058 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.025 away. White text reads best on it, at 17.91:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.91:1 |
Values
| HEX | #041731 |
| RGB | rgb(4, 23, 49) |
| HSL | hsl(215, 85%, 10%) |
| OKLCH | oklch(20.6% 0.058 256.1) |
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 #041731 | 17.91:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #041731 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #041731 text on white | 17.91:1 | AAA | Lc 104.5 | Preferred for body text |
| #041731 text on black | 1.17:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#72A3E4
oklch(70.7% 0.109 255.8)
-
Step 500
500
#4C8ADC
oklch(63% 0.14 256.1)
-
Step 600
600
#2E72CA
oklch(55.5% 0.153 256.4)
-
Step 700
700
#205FAF
oklch(49% 0.142 256.4)
-
Step 800
800
#1D4E8D
oklch(42.6% 0.117 256.3)
-
Step 900
900
#1D4271
oklch(37.8% 0.091 255.6)
-
Step 950
950 (this color)
#041731
oklch(20.6% 0.058 256.1)
#041731 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) | #0A1932 | 0.012 |
| Deuteranopia (no green cones) | #031530 | 0.007 |
| Tritanopia (no blue cones) | #001D21 | 0.044 |
| Achromatopsia (no color) | #171717 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #041731
#041731
oklch(20.6% 0.058 256.1)
- #221400
#221400
oklch(20.5% 0.043 76.7)
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 #041731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.025
- Navy Blue #001146 ΔE 0.045
- Rich Navy #001219 ΔE 0.052
- Dark #1B2431 ΔE 0.060
- Dark Navy #000435 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.065
- Night Blue #040348 ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.071
Use #041731 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.