#284B80
Closest named color: Light Navy (#155084). oklch(41.5% 0.098 258.5), rgb(40, 75, 128).
Aa
White text reads best on this color (8.71:1).
About this color
#284B80 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.098 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.019 away. White text reads best on it, at 8.71:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #284B80 |
| RGB | rgb(40, 75, 128) |
| HSL | hsl(216, 52%, 33%) |
| OKLCH | oklch(41.5% 0.098 258.5) |
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 #284B80 | 8.71:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #284B80 | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #284B80 text on white | 8.71:1 | AAA | Lc 89.7 | Fine for body text |
| #284B80 text on black | 2.40:1 | Fails | Lc -12.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#AAC2E6
oklch(80.8% 0.057 258.4)
-
Step 400
400
#7DA2DA
oklch(70.7% 0.092 258.5)
-
Step 500
500
#5C8AD0
oklch(63.1% 0.118 258.5)
-
Step 600
600
#4273BD
oklch(55.7% 0.127 258.4)
-
Step 700
700
#3460A3
oklch(49.2% 0.118 258.6)
-
Step 800
800 (this color)
#284B80
oklch(41.5% 0.098 258.5)
-
Step 900
900
#27426A
oklch(37.8% 0.076 258.1)
-
Step 950
950
#17273E
oklch(27.1% 0.048 257.5)
#284B80 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) | #334F82 | 0.018 |
| Deuteranopia (no green cones) | #26477F | 0.012 |
| Tritanopia (no blue cones) | #00575F | 0.079 |
| Achromatopsia (no color) | #4B4B4B | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284B80
#284B80
oklch(41.5% 0.098 258.5)
- #654500
#654500
oklch(41.6% 0.086 78.5)
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 #284B80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.019
- Dusk Blue #26538D ΔE 0.029
- Cobalt #1E488F ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.031
- Twilight Blue #0A437A ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.046
- Twilight #4E518B ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
Use #284B80 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.