#284779
Closest named color: Twilight Blue (#0A437A). oklch(40% 0.092 259.5), rgb(40, 71, 121).
Aa
White text reads best on this color (9.26:1).
About this color
#284779 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.092 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.028 away. White text reads best on it, at 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #284779 |
| RGB | rgb(40, 71, 121) |
| HSL | hsl(217, 50%, 32%) |
| OKLCH | oklch(40% 0.092 259.5) |
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 #284779 | 9.26:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #284779 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #284779 text on white | 9.26:1 | AAA | Lc 91.2 | Preferred for body text |
| #284779 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A6C2EE
oklch(80.9% 0.07 259.3)
-
Step 400
400
#77A1E6
oklch(70.7% 0.112 260)
-
Step 500
500
#5388DE
oklch(63% 0.142 259.6)
-
Step 600
600
#3770CC
oklch(55.5% 0.155 259.6)
-
Step 700
700
#2A5EB0
oklch(49.2% 0.142 259.3)
-
Step 800
800
#244D8F
oklch(42.8% 0.119 259.5)
-
Step 900
900 (this color)
#284779
oklch(40% 0.092 259.5)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#284779 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) | #314B7B | 0.017 |
| Deuteranopia (no green cones) | #254478 | 0.010 |
| Tritanopia (no blue cones) | #00525A | 0.075 |
| Achromatopsia (no color) | #474747 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284779
#284779
oklch(40% 0.092 259.5)
- #5F4200
#5F4200
oklch(40.1% 0.083 80.2)
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 #284779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.028
- Light Navy #155084 ΔE 0.030
- Cobalt #1E488F ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.041
- Dusk Blue #26538D ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
Use #284779 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.