#18384D
Closest named color: Dark Blue Grey (#1F3B4D). oklch(32.7% 0.053 239.9), rgb(24, 56, 77).
Aa
White text reads best on this color (12.26:1).
About this color
#18384D is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.053 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.014 away. White text reads best on it, at 12.26:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.71:1 |
| White text | 12.26:1 |
Values
| HEX | #18384D |
| RGB | rgb(24, 56, 77) |
| HSL | hsl(204, 52%, 20%) |
| OKLCH | oklch(32.7% 0.053 239.9) |
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 #18384D | 12.26:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #18384D | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #18384D text on white | 12.26:1 | AAA | Lc 97.8 | Preferred for body text |
| #18384D text on black | 1.71:1 | 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 900.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#AAC5D8
oklch(80.9% 0.04 238.7)
-
Step 400
400
#7CA6C5
oklch(70.6% 0.064 240.8)
-
Step 500
500
#5990B6
oklch(63% 0.082 240)
-
Step 600
600
#3D7AA2
oklch(55.6% 0.089 239.8)
-
Step 700
700
#2F668B
oklch(49% 0.083 240.8)
-
Step 800
800
#285470
oklch(42.8% 0.067 239)
-
Step 900
900 (this color)
#18384D
oklch(32.7% 0.053 239.9)
-
Step 950
950
#162935
oklch(27.1% 0.033 237.5)
#18384D 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) | #2E384E | 0.028 |
| Deuteranopia (no green cones) | #27334D | 0.023 |
| Tritanopia (no blue cones) | #003D3F | 0.039 |
| Achromatopsia (no color) | #353535 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18384D
#18384D
oklch(32.7% 0.053 239.9)
- #482E17
#482E17
oklch(32.7% 0.052 60.9)
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 #18384D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.014
- Midnight Green #073B4C ΔE 0.015
- Prussian Blue #1D3557 ΔE 0.023
- Gunmetal #293241 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.041
- Onyx #343A40 ΔE 0.044
- Charcoal #264653 ΔE 0.051
- Marine Blue #01386A ΔE 0.053
Use #18384D 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.