#284775
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.087 258.1), rgb(40, 71, 117).
Aa
White text reads best on this color (9.34:1).
About this color
#284775 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.087 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.029 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #284775 |
| RGB | rgb(40, 71, 117) |
| HSL | hsl(216, 49%, 31%) |
| OKLCH | oklch(39.8% 0.087 258.1) |
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 #284775 | 9.34:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #284775 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #284775 text on white | 9.34:1 | AAA | Lc 91.4 | Preferred for body text |
| #284775 text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A7C2EB
oklch(80.8% 0.065 258.6)
-
Step 400
400
#78A2E1
oklch(70.7% 0.104 258.3)
-
Step 500
500
#548AD9
oklch(63.2% 0.133 257.9)
-
Step 600
600
#3972C6
oklch(55.7% 0.144 258.2)
-
Step 700
700
#2B5FAB
oklch(49.1% 0.134 258.1)
-
Step 800
800
#254E8B
oklch(42.8% 0.111 258.3)
-
Step 900
900 (this color)
#284775
oklch(39.8% 0.087 258.1)
-
Step 950
950
#152641
oklch(26.9% 0.056 259.3)
#284775 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) | #334B77 | 0.019 |
| Deuteranopia (no green cones) | #284374 | 0.012 |
| Tritanopia (no blue cones) | #005158 | 0.071 |
| Achromatopsia (no color) | #474747 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284775
#284775
oklch(39.8% 0.087 258.1)
- #5F4000
#5F4000
oklch(39.7% 0.083 77.7)
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 #284775, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.029
- Light Navy #155084 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.042
- Cobalt #1E488F ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Dusk Blue #26538D ΔE 0.049
- Charcoal #264653 ΔE 0.059
- Marine Blue #01386A ΔE 0.061
Use #284775 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.