#284C71
Closest named color: Light Navy (#155084). oklch(40.8% 0.075 250.7), rgb(40, 76, 113).
Aa
White text reads best on this color (8.88:1).
About this color
#284C71 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.075 and its hue 251°. 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 8.88:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #284C71 |
| RGB | rgb(40, 76, 113) |
| HSL | hsl(210, 48%, 30%) |
| OKLCH | oklch(40.8% 0.075 250.7) |
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 #284C71 | 8.88:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #284C71 | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #284C71 text on white | 8.88:1 | AAA | Lc 90.2 | Preferred for body text |
| #284C71 text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DD
oklch(80.8% 0.045 251.6)
-
Step 400
400
#80A4CB
oklch(70.6% 0.07 250.8)
-
Step 500
500
#5F8DBE
oklch(63% 0.09 250.9)
-
Step 600
600
#4577AA
oklch(55.7% 0.097 250.4)
-
Step 700
700
#366492
oklch(49.2% 0.09 250.1)
-
Step 800
800 (this color)
#284C71
oklch(40.8% 0.075 250.7)
-
Step 900
900
#294460
oklch(37.8% 0.058 250.4)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#284C71 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) | #3C4E73 | 0.026 |
| Deuteranopia (no green cones) | #324770 | 0.017 |
| Tritanopia (no blue cones) | #005559 | 0.062 |
| Achromatopsia (no color) | #4A4A4A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284C71
#284C71
oklch(40.8% 0.075 250.7)
- #634214
#634214
oklch(40.8% 0.075 71.2)
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 #284C71, 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 0.036
- Dark Grey Blue #29465B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.043
- Dusk Blue #26538D ΔE 0.048
- Charcoal #264653 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.053
- Cobalt #1E488F ΔE 0.054
Use #284C71 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.