#284F85
Closest named color: Light Navy (#155084). oklch(42.7% 0.1 257), rgb(40, 79, 133).
Aa
White text reads best on this color (8.24:1).
About this color
#284F85 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.100 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.014 away. White text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #284F85 |
| RGB | rgb(40, 79, 133) |
| HSL | hsl(215, 54%, 34%) |
| OKLCH | oklch(42.7% 0.1 257) |
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 #284F85 | 8.24:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #284F85 | 2.54:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #284F85 text on white | 8.24:1 | AAA | Lc 88.2 | Fine for body text |
| #284F85 text on black | 2.54:1 | Fails | Lc -13.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C3E7
oklch(81% 0.058 256.6)
-
Step 400
400
#7BA3DB
oklch(70.8% 0.094 256.9)
-
Step 500
500
#588BD1
oklch(63.2% 0.12 256.6)
-
Step 600
600
#3D73BE
oklch(55.5% 0.131 257.1)
-
Step 700
700
#2F60A4
oklch(49% 0.122 257.2)
-
Step 800
800 (this color)
#284F85
oklch(42.7% 0.1 257)
-
Step 900
900
#25426A
oklch(37.7% 0.077 256.8)
-
Step 950
950
#16273E
oklch(27% 0.049 256.3)
#284F85 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) | #365387 | 0.021 |
| Deuteranopia (no green cones) | #284B84 | 0.012 |
| Tritanopia (no blue cones) | #005B63 | 0.080 |
| Achromatopsia (no color) | #4F4F4F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F85
#284F85
oklch(42.7% 0.1 257)
- #6A4700
#6A4700
oklch(42.6% 0.089 76.7)
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 #284F85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.014
- Dusk Blue #26538D ΔE 0.016
- Deep Sea Blue #015482 ΔE 0.026
- Cobalt #1E488F ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.048
- Twilight #4E518B ΔE 0.051
Use #284F85 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.