#284F75
Closest named color: Light Navy (#155084). oklch(41.8% 0.078 249.6), rgb(40, 79, 117).
Aa
White text reads best on this color (8.51:1).
About this color
#284F75 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.078 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.027 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #284F75 |
| RGB | rgb(40, 79, 117) |
| HSL | hsl(210, 49%, 31%) |
| OKLCH | oklch(41.8% 0.078 249.6) |
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 #284F75 | 8.51:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #284F75 | 2.46:1 | Fails | Lc 14.9 | Not readable |
| #284F75 text on white | 8.51:1 | AAA | Lc 89.1 | Fine for body text |
| #284F75 text on black | 2.46:1 | Fails | Lc -13.1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC4DD
oklch(81% 0.045 248.4)
-
Step 400
400
#7EA5CD
oklch(70.8% 0.073 249.5)
-
Step 500
500
#5C8EC0
oklch(63.2% 0.093 249.5)
-
Step 600
600
#4177AC
oklch(55.6% 0.101 249.7)
-
Step 700
700
#326494
oklch(49.1% 0.094 249.5)
-
Step 800
800 (this color)
#284F75
oklch(41.8% 0.078 249.6)
-
Step 900
900
#274461
oklch(37.8% 0.061 249.7)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#284F75 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) | #3F5177 | 0.029 |
| Deuteranopia (no green cones) | #344974 | 0.021 |
| Tritanopia (no blue cones) | #00585C | 0.063 |
| Achromatopsia (no color) | #4D4D4D | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F75
#284F75
oklch(41.8% 0.078 249.6)
- #674415
#674415
oklch(41.7% 0.078 70.1)
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 #284F75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.029
- Dusk Blue #26538D ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.048
- Cobalt #1E488F ΔE 0.052
Use #284F75 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.