#183544
Closest named color: Midnight Green (#073B4C). oklch(31.4% 0.044 233.1), rgb(24, 53, 68).
Aa
White text reads best on this color (12.87:1).
About this color
#183544 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.044 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.022 away. White text reads best on it, at 12.87:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.63:1 |
| White text | 12.87:1 |
Values
| HEX | #183544 |
| RGB | rgb(24, 53, 68) |
| HSL | hsl(200, 48%, 18%) |
| OKLCH | oklch(31.4% 0.044 233.1) |
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 #183544 | 12.87:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #183544 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #183544 text on white | 12.87:1 | AAA | Lc 98.9 | Preferred for body text |
| #183544 text on black | 1.63:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DD
oklch(80.9% 0.052 233)
-
Step 400
400
#69AACC
oklch(70.7% 0.083 232.5)
-
Step 500
500
#3A94BF
oklch(63.1% 0.106 232.8)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#104760
oklch(37.6% 0.069 233.2)
-
Step 950
950 (this color)
#183544
oklch(31.4% 0.044 233.1)
#183544 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) | #2E3445 | 0.030 |
| Deuteranopia (no green cones) | #283044 | 0.025 |
| Tritanopia (no blue cones) | #00393A | 0.032 |
| Achromatopsia (no color) | #323232 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183544
#183544
oklch(31.4% 0.044 233.1)
- #432B1B
#432B1B
oklch(31.4% 0.044 54.1)
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 #183544, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.022
- Gunmetal #293241 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.036
- Onyx #343A40 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.050
- Dark #1B2431 ΔE 0.060
Use #183544 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.