#284E7F
Closest named color: Light Navy (#155084). oklch(42.1% 0.093 255.7), rgb(40, 78, 127).
Aa
White text reads best on this color (8.44:1).
About this color
#284E7F is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.093 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.015 away. White text reads best on it, at 8.44:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #284E7F |
| RGB | rgb(40, 78, 127) |
| HSL | hsl(214, 52%, 33%) |
| OKLCH | oklch(42.1% 0.093 255.7) |
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 #284E7F | 8.44:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #284E7F | 2.48:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #284E7F text on white | 8.44:1 | AAA | Lc 88.9 | Fine for body text |
| #284E7F text on black | 2.48:1 | Fails | Lc -13.3 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAED
oklch(88.4% 0.03 256)
-
Step 300
300
#AAC3E4
oklch(81% 0.054 255.4)
-
Step 400
400
#7CA3D6
oklch(70.7% 0.087 255.4)
-
Step 500
500
#5A8BCC
oklch(63% 0.112 255.9)
-
Step 600
600
#4074B8
oklch(55.5% 0.12 255.9)
-
Step 700
700
#31619F
oklch(49% 0.113 255.8)
-
Step 800
800 (this color)
#284E7F
oklch(42.1% 0.093 255.7)
-
Step 900
900
#264267
oklch(37.6% 0.072 255.9)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#284E7F 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) | #385281 | 0.023 |
| Deuteranopia (no green cones) | #2C497E | 0.015 |
| Tritanopia (no blue cones) | #005960 | 0.074 |
| Achromatopsia (no color) | #4D4D4D | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284E7F
#284E7F
oklch(42.1% 0.093 255.7)
- #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 #284E7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.015
- Deep Sea Blue #015482 ΔE 0.025
- Dusk Blue #26538D ΔE 0.025
- Cobalt #1E488F ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.053
- YInMn Blue #415A77 ΔE 0.053
Use #284E7F 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.