#284C74
Closest named color: Light Navy (#155084). oklch(41% 0.079 252.5), rgb(40, 76, 116).
Aa
White text reads best on this color (8.83:1).
About this color
#284C74 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.079 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.029 away. White text reads best on it, at 8.83:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #284C74 |
| RGB | rgb(40, 76, 116) |
| HSL | hsl(212, 49%, 31%) |
| OKLCH | oklch(41% 0.079 252.5) |
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 #284C74 | 8.83:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #284C74 | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #284C74 text on white | 8.83:1 | AAA | Lc 90.0 | Preferred for body text |
| #284C74 text on black | 2.37:1 | Fails | Lc -12.2 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ACC3DE
oklch(80.9% 0.046 252.5)
-
Step 400
400
#7FA4CE
oklch(70.7% 0.074 252)
-
Step 500
500
#5E8DC2
oklch(63.2% 0.095 252.3)
-
Step 600
600
#4476AE
oklch(55.6% 0.103 252.5)
-
Step 700
700
#356395
oklch(49.1% 0.095 252.1)
-
Step 800
800 (this color)
#284C74
oklch(41% 0.079 252.5)
-
Step 900
900
#284362
oklch(37.6% 0.063 252.8)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#284C74 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) | #3B4E76 | 0.024 |
| Deuteranopia (no green cones) | #314773 | 0.017 |
| Tritanopia (no blue cones) | #00555A | 0.065 |
| Achromatopsia (no color) | #4A4A4A | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284C74
#284C74
oklch(41% 0.079 252.5)
- #64420E
#64420E
oklch(40.9% 0.079 72.4)
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 #284C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.043
- Dusk Blue #26538D ΔE 0.043
- Cobalt #1E488F ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.055
Use #284C74 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.