#182437
Closest named color: Oxford Blue (#1B263B). oklch(25.9% 0.04 259.3), rgb(24, 36, 55).
Aa
White text reads best on this color (15.59:1).
About this color
#182437 is a dark, muted blue. In OKLCH its lightness is 26%, its chroma 0.040 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.011 away. White text reads best on it, at 15.59:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.59:1 |
Values
| HEX | #182437 |
| RGB | rgb(24, 36, 55) |
| HSL | hsl(217, 39%, 15%) |
| OKLCH | oklch(25.9% 0.04 259.3) |
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 #182437 | 15.59:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #182437 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #182437 text on white | 15.59:1 | AAA | Lc 102.5 | Preferred for body text |
| #182437 text on black | 1.34:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AFC2E0
oklch(80.9% 0.047 259.5)
-
Step 400
400
#85A2D0
oklch(70.7% 0.075 259.5)
-
Step 500
500
#668AC4
oklch(63.1% 0.097 259.7)
-
Step 600
600
#4D73B0
oklch(55.5% 0.105 259.5)
-
Step 700
700
#3E6197
oklch(49.2% 0.096 258.8)
-
Step 800
800
#334F7B
oklch(42.7% 0.081 259.1)
-
Step 900
900
#2D4263
oklch(37.7% 0.063 259.2)
-
Step 950
950 (this color)
#182437
oklch(25.9% 0.04 259.3)
#182437 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) | #1D2538 | 0.009 |
| Deuteranopia (no green cones) | #192237 | 0.007 |
| Tritanopia (no blue cones) | #0B282B | 0.035 |
| Achromatopsia (no color) | #242424 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #182437
#182437
oklch(25.9% 0.04 259.3)
- #2E210B
#2E210B
oklch(25.8% 0.04 78.5)
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 #182437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.011
- Dark #1B2431 ΔE 0.012
- Jet #212529 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.074
- Marine #042E60 ΔE 0.076
Use #182437 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.