#28384C
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.6% 0.041 254.4), rgb(40, 56, 76).
Aa
White text reads best on this color (11.93:1).
About this color
#28384C is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.041 and its hue 254°. 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 11.93:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.76:1 |
| White text | 11.93:1 |
Values
| HEX | #28384C |
| RGB | rgb(40, 56, 76) |
| HSL | hsl(213, 31%, 23%) |
| OKLCH | oklch(33.6% 0.041 254.4) |
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 #28384C | 11.93:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #28384C | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #28384C text on white | 11.93:1 | AAA | Lc 97.3 | Preferred for body text |
| #28384C text on black | 1.76:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B3C2D5
oklch(80.9% 0.032 254.3)
-
Step 400
400
#8CA3C0
oklch(70.8% 0.05 254.4)
-
Step 500
500
#6F8CB0
oklch(63.2% 0.064 254.1)
-
Step 600
600
#57759B
oklch(55.5% 0.069 254.7)
-
Step 700
700
#476385
oklch(49.2% 0.064 253.8)
-
Step 800
800
#3B506C
oklch(42.6% 0.054 255.8)
-
Step 900
900 (this color)
#28384C
oklch(33.6% 0.041 254.4)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#28384C 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) | #30394D | 0.013 |
| Deuteranopia (no green cones) | #2C354C | 0.011 |
| Tritanopia (no blue cones) | #1B3C3F | 0.035 |
| Achromatopsia (no color) | #373737 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28384C
#28384C
oklch(33.6% 0.041 254.4)
- #44341E
#44341E
oklch(33.7% 0.042 74.4)
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 #28384C, 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
- Gunmetal #293241 ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.028
- Onyx #343A40 ΔE 0.030
- Midnight Green #073B4C ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.036
- Charcoal #264653 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.047
Use #28384C 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.