#285FB9
Closest named color: Mid Blue (#276AB3). oklch(50% 0.154 259.9), rgb(40, 95, 185).
Aa
White text reads best on this color (6.12:1).
About this color
#285FB9 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.154 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.033 away. White text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #285FB9 |
| RGB | rgb(40, 95, 185) |
| HSL | hsl(217, 64%, 44%) |
| OKLCH | oklch(50% 0.154 259.9) |
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 #285FB9 | 6.12:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #285FB9 | 3.42:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #285FB9 text on white | 6.12:1 | AA | Lc 80.1 | Fine for body text |
| #285FB9 text on black | 3.42:1 | AA large text | Lc -21.7 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500
#4F87E4
oklch(63% 0.153 260)
-
Step 600
600
#336FD2
oklch(55.6% 0.165 259.9)
-
Step 700
700 (this color)
#285FB9
oklch(50% 0.154 259.9)
-
Step 800
800
#204C93
oklch(42.7% 0.127 259.6)
-
Step 900
900
#204075
oklch(37.7% 0.098 259.9)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#285FB9 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) | #2B69BC | 0.028 |
| Deuteranopia (no green cones) | #005CB7 | 0.022 |
| Tritanopia (no blue cones) | #007583 | 0.120 |
| Achromatopsia (no color) | #626262 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #285FB9
#285FB9
oklch(50% 0.154 259.9)
- #825B00
#825B00
oklch(50% 0.104 79.6)
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 #285FB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.033
- French Blue #436BAD ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.063
- Dusky Blue #475F94 ΔE 0.065
- Warm Blue #4B57DB ΔE 0.067
- Peacock Blue #016795 ΔE 0.068
- Flat Blue #3C73A8 ΔE 0.071
- Iris #6258C4 ΔE 0.071
Use #285FB9 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.