#285799
Closest named color: Dusk Blue (#26538D). oklch(45.9% 0.119 257.4), rgb(40, 87, 153).
Aa
White text reads best on this color (7.20:1).
About this color
#285799 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.119 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.022 away. White text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #285799 |
| RGB | rgb(40, 87, 153) |
| HSL | hsl(215, 59%, 38%) |
| OKLCH | oklch(45.9% 0.119 257.4) |
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 #285799 | 7.20:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #285799 | 2.91:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #285799 text on white | 7.20:1 | AAA | Lc 84.7 | Fine for body text |
| #285799 text on black | 2.91:1 | Fails | Lc -17.3 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#AAC2E6
oklch(80.8% 0.057 258.4)
-
Step 400
400
#7CA2DA
oklch(70.6% 0.093 257.9)
-
Step 500
500
#5A8AD0
oklch(63% 0.118 257.8)
-
Step 600
600
#3F73BD
oklch(55.6% 0.128 257.5)
-
Step 700
700 (this color)
#285799
oklch(45.9% 0.119 257.4)
-
Step 800
800
#294F84
oklch(42.7% 0.099 257.1)
-
Step 900
900
#26426A
oklch(37.8% 0.077 257.4)
-
Step 950
950
#17273E
oklch(27.1% 0.048 257.5)
#285799 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) | #375D9C | 0.025 |
| Deuteranopia (no green cones) | #235298 | 0.016 |
| Tritanopia (no blue cones) | #006670 | 0.093 |
| Achromatopsia (no color) | #575757 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #285799
#285799
oklch(45.9% 0.119 257.4)
- #755000
#755000
oklch(46% 0.096 78)
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 #285799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.022
- Denim Blue #3B5B92 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.031
- Light Navy #155084 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.046
- Cobalt #1E488F ΔE 0.046
- Twilight #4E518B ΔE 0.048
Use #285799 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.