#284A78
Closest named color: Light Navy (#155084). oklch(40.7% 0.087 256.5), rgb(40, 74, 120).
Aa
White text reads best on this color (8.97:1).
About this color
#284A78 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.087 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.026 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.34:1 |
| White text | 8.97:1 |
Values
| HEX | #284A78 |
| RGB | rgb(40, 74, 120) |
| HSL | hsl(215, 50%, 31%) |
| OKLCH | oklch(40.7% 0.087 256.5) |
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 #284A78 | 8.97:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #284A78 | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #284A78 text on white | 8.97:1 | AAA | Lc 90.4 | Preferred for body text |
| #284A78 text on black | 2.34:1 | Fails | Lc -11.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC3E2
oklch(81% 0.051 255.9)
-
Step 400
400
#7FA3D3
oklch(70.7% 0.081 255.8)
-
Step 500
500
#5F8BC8
oklch(63.1% 0.105 256.7)
-
Step 600
600
#4574B5
oklch(55.6% 0.114 256.8)
-
Step 700
700
#36619B
oklch(49% 0.105 256.4)
-
Step 800
800 (this color)
#284A78
oklch(40.7% 0.087 256.5)
-
Step 900
900
#294265
oklch(37.6% 0.068 257)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#284A78 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) | #364D7A | 0.020 |
| Deuteranopia (no green cones) | #2B4677 | 0.012 |
| Tritanopia (no blue cones) | #00555B | 0.072 |
| Achromatopsia (no color) | #494949 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284A78
#284A78
oklch(40.7% 0.087 256.5)
- #634200
#634200
oklch(40.6% 0.085 76.6)
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 #284A78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.026
- Twilight Blue #0A437A ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.034
- Dusk Blue #26538D ΔE 0.040
- Cobalt #1E488F ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.061
Use #284A78 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.