#284D71
Closest named color: Light Navy (#155084). oklch(41% 0.074 249.5), rgb(40, 77, 113).
Aa
White text reads best on this color (8.78:1).
About this color
#284D71 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.033 away. White text reads best on it, at 8.78:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.39:1 |
| White text | 8.78:1 |
Values
| HEX | #284D71 |
| RGB | rgb(40, 77, 113) |
| HSL | hsl(210, 48%, 30%) |
| OKLCH | oklch(41% 0.074 249.5) |
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 #284D71 | 8.78:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #284D71 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #284D71 text on white | 8.78:1 | AAA | Lc 89.9 | Fine for body text |
| #284D71 text on black | 2.39:1 | Fails | Lc -12.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE9
oklch(88.5% 0.025 248.1)
-
Step 300
300
#ACC3DC
oklch(80.8% 0.043 250.6)
-
Step 400
400
#7FA5CB
oklch(70.8% 0.07 248.8)
-
Step 500
500
#5E8EBD
oklch(63.2% 0.088 248.9)
-
Step 600
600
#4477A9
oklch(55.6% 0.096 249.5)
-
Step 700
700
#356491
oklch(49.1% 0.089 249.2)
-
Step 800
800 (this color)
#284D71
oklch(41% 0.074 249.5)
-
Step 900
900
#28445F
oklch(37.7% 0.058 248.7)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#284D71 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) | #3E4E73 | 0.028 |
| Deuteranopia (no green cones) | #344770 | 0.021 |
| Tritanopia (no blue cones) | #00555A | 0.058 |
| Achromatopsia (no color) | #4B4B4B | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284D71
#284D71
oklch(41% 0.074 249.5)
- #644217
#644217
oklch(40.9% 0.074 69)
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 #284D71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.039
- Twilight Blue #0A437A ΔE 0.045
- Dusk Blue #26538D ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.051
- Charcoal #264653 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.053
Use #284D71 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.