#284C80
Closest named color: Light Navy (#155084). oklch(41.7% 0.097 257.7), rgb(40, 76, 128).
Aa
White text reads best on this color (8.62:1).
About this color
#284C80 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.097 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.017 away. White text reads best on it, at 8.62:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.43:1 |
| White text | 8.62:1 |
Values
| HEX | #284C80 |
| RGB | rgb(40, 76, 128) |
| HSL | hsl(215, 52%, 33%) |
| OKLCH | oklch(41.7% 0.097 257.7) |
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 #284C80 | 8.62:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #284C80 | 2.43:1 | Fails | Lc 14.6 | Not readable |
| #284C80 text on white | 8.62:1 | AAA | Lc 89.4 | Fine for body text |
| #284C80 text on black | 2.43:1 | Fails | Lc -12.9 | 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
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#AAC2E6
oklch(80.8% 0.057 258.4)
-
Step 400
400
#7DA2D9
oklch(70.6% 0.091 258.1)
-
Step 500
500
#5B8ACF
oklch(63% 0.117 257.9)
-
Step 600
600
#4173BC
oklch(55.6% 0.126 257.9)
-
Step 700
700
#3360A2
oklch(49.1% 0.117 258)
-
Step 800
800 (this color)
#284C80
oklch(41.7% 0.097 257.7)
-
Step 900
900
#274269
oklch(37.7% 0.075 257.6)
-
Step 950
950
#17273E
oklch(27.1% 0.048 257.5)
#284C80 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) | #355082 | 0.020 |
| Deuteranopia (no green cones) | #28487F | 0.012 |
| Tritanopia (no blue cones) | #00585F | 0.079 |
| Achromatopsia (no color) | #4C4C4C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284C80
#284C80
oklch(41.7% 0.097 257.7)
- #664500
#664500
oklch(41.7% 0.087 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 #284C80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.017
- Dusk Blue #26538D ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.029
- Cobalt #1E488F ΔE 0.031
- Twilight Blue #0A437A ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight #4E518B ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.057
Use #284C80 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.