#284E7D
Closest named color: Light Navy (#155084). oklch(42% 0.09 254.8), rgb(40, 78, 125).
Aa
White text reads best on this color (8.48:1).
About this color
#284E7D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.090 and its hue 255°. 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 8.48:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.47:1 |
| White text | 8.48:1 |
Values
| HEX | #284E7D |
| RGB | rgb(40, 78, 125) |
| HSL | hsl(213, 52%, 32%) |
| OKLCH | oklch(42% 0.09 254.8) |
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 #284E7D | 8.48:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #284E7D | 2.47:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #284E7D text on white | 8.48:1 | AAA | Lc 89.0 | Fine for body text |
| #284E7D text on black | 2.47:1 | Fails | Lc -13.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDBED
oklch(88.6% 0.029 254.7)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7DA3D5
oklch(70.7% 0.085 255.5)
-
Step 500
500
#5B8CC9
oklch(63.1% 0.107 254.6)
-
Step 600
600
#4075B6
oklch(55.6% 0.116 254.6)
-
Step 700
700
#32629D
oklch(49.2% 0.109 254.8)
-
Step 800
800 (this color)
#284E7D
oklch(42% 0.09 254.8)
-
Step 900
900
#264366
oklch(37.8% 0.07 254.1)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#284E7D 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) | #39517F | 0.023 |
| Deuteranopia (no green cones) | #2D497C | 0.015 |
| Tritanopia (no blue cones) | #00595F | 0.073 |
| Achromatopsia (no color) | #4D4D4D | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284E7D
#284E7D
oklch(42% 0.09 254.8)
- #694500
#694500
oklch(42.1% 0.089 75.2)
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 #284E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.025
- Dusk Blue #26538D ΔE 0.028
- Cobalt #1E488F ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.043
- YInMn Blue #415A77 ΔE 0.052
- Dusk #4E5481 ΔE 0.054
Use #284E7D 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.