#183648
Closest named color: Midnight Green (#073B4C). oklch(31.9% 0.048 237.3), rgb(24, 54, 72).
Aa
White text reads best on this color (12.64:1).
About this color
#183648 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.048 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.018 away. White text reads best on it, at 12.64:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.66:1 |
| White text | 12.64:1 |
Values
| HEX | #183648 |
| RGB | rgb(24, 54, 72) |
| HSL | hsl(203, 50%, 19%) |
| OKLCH | oklch(31.9% 0.048 237.3) |
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 #183648 | 12.64:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #183648 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #183648 text on white | 12.64:1 | AAA | Lc 98.5 | Preferred for body text |
| #183648 text on black | 1.66:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEC
oklch(88.5% 0.032 236.4)
-
Step 300
300
#9EC7E1
oklch(80.9% 0.057 236.2)
-
Step 400
400
#66A9D3
oklch(70.7% 0.092 237.5)
-
Step 500
500
#3593C7
oklch(63.1% 0.116 237.3)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#0C4765
oklch(37.8% 0.076 237.1)
-
Step 950
950 (this color)
#183648
oklch(31.9% 0.048 237.3)
#183648 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) | #2E3649 | 0.029 |
| Deuteranopia (no green cones) | #273148 | 0.023 |
| Tritanopia (no blue cones) | #003B3C | 0.036 |
| Achromatopsia (no color) | #333333 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183648
#183648
oklch(31.9% 0.048 237.3)
- #452C19
#452C19
oklch(31.9% 0.048 57.2)
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 #183648, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.018
- Dark Blue Grey #1F3B4D ΔE 0.020
- Gunmetal #293241 ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.035
- Onyx #343A40 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.054
- Marine #042E60 ΔE 0.057
Use #183648 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.