#285378
Closest named color: Deep Sea Blue (#015482). oklch(42.9% 0.078 246.8), rgb(40, 83, 120).
Aa
White text reads best on this color (8.08:1).
About this color
#285378 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.078 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.025 away. White text reads best on it, at 8.08:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #285378 |
| RGB | rgb(40, 83, 120) |
| HSL | hsl(208, 50%, 31%) |
| OKLCH | oklch(42.9% 0.078 246.8) |
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 #285378 | 8.08:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #285378 | 2.59:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #285378 text on white | 8.08:1 | AAA | Lc 87.8 | Fine for body text |
| #285378 text on black | 2.59:1 | Fails | Lc -14.4 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#AAC4DD
oklch(80.9% 0.045 247.3)
-
Step 400
400
#7BA5CC
oklch(70.6% 0.073 247)
-
Step 500
500
#588FBF
oklch(63.2% 0.093 246.3)
-
Step 600
600
#3C78AB
oklch(55.6% 0.101 246.6)
-
Step 700
700
#2E6593
oklch(49.1% 0.094 246.5)
-
Step 800
800 (this color)
#285378
oklch(42.9% 0.078 246.8)
-
Step 900
900
#254460
oklch(37.6% 0.061 247.4)
-
Step 950
950
#162838
oklch(26.9% 0.038 246.6)
#285378 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) | #43547A | 0.032 |
| Deuteranopia (no green cones) | #384C77 | 0.025 |
| Tritanopia (no blue cones) | #005C60 | 0.060 |
| Achromatopsia (no color) | #505050 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #285378
#285378
oklch(42.9% 0.078 246.8)
- #6C461A
#6C461A
oklch(42.9% 0.078 66.6)
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 #285378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.025
- Light Navy #155084 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusk Blue #26538D ΔE 0.035
- YInMn Blue #415A77 ΔE 0.038
- Dusk #4E5481 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.052
- Petrol #005F6A ΔE 0.053
Use #285378 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.