#181E2F
Closest named color: Dark (#1B2431). oklch(23.8% 0.034 268.8), rgb(24, 30, 47).
Aa
White text reads best on this color (16.59:1).
About this color
#181E2F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.034 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.022 away. White text reads best on it, at 16.59:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.26:1 |
| White text | 16.59:1 |
Values
| HEX | #181E2F |
| RGB | rgb(24, 30, 47) |
| HSL | hsl(224, 32%, 14%) |
| OKLCH | oklch(23.8% 0.034 268.8) |
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 #181E2F | 16.59:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #181E2F | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #181E2F text on white | 16.59:1 | AAA | Lc 103.5 | Preferred for body text |
| #181E2F text on black | 1.26:1 | 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
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DC
oklch(80.9% 0.041 269.9)
-
Step 400
400
#90A0CA
oklch(70.8% 0.064 268.5)
-
Step 500
500
#7588BC
oklch(63.2% 0.082 268.6)
-
Step 600
600
#5E71A8
oklch(55.7% 0.089 268.9)
-
Step 700
700
#4D5E90
oklch(49% 0.083 268.9)
-
Step 800
800
#3F4D75
oklch(42.7% 0.069 268.7)
-
Step 900
900
#36405E
oklch(37.6% 0.053 269.6)
-
Step 950
950 (this color)
#181E2F
oklch(23.8% 0.034 268.8)
#181E2F 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) | #182030 | 0.007 |
| Deuteranopia (no green cones) | #161E2F | 0.003 |
| Tritanopia (no blue cones) | #102124 | 0.030 |
| Achromatopsia (no color) | #1E1E1E | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181E2F
#181E2F
oklch(23.8% 0.034 268.8)
- #251E0A
#251E0A
oklch(23.8% 0.035 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 #181E2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.022
- Rich Black #0D1B2A ΔE 0.023
- Oxford Blue #1B263B ΔE 0.033
- Jet #212529 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.073
- Navy Blue #001146 ΔE 0.074
- Gunmetal #293241 ΔE 0.078
Use #181E2F 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.