#284E7B
Closest named color: Light Navy (#155084). oklch(41.9% 0.087 254), rgb(40, 78, 123).
Aa
White text reads best on this color (8.51:1).
About this color
#284E7B is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.019 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #284E7B |
| RGB | rgb(40, 78, 123) |
| HSL | hsl(213, 51%, 32%) |
| OKLCH | oklch(41.9% 0.087 254) |
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 #284E7B | 8.51:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #284E7B | 2.46:1 | Fails | Lc 14.9 | Not readable |
| #284E7B text on white | 8.51:1 | AAA | Lc 89.1 | Fine for body text |
| #284E7B text on black | 2.46:1 | Fails | Lc -13.1 | 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
#CDDBEC
oklch(88.6% 0.028 253.2)
-
Step 300
300
#AAC3E2
oklch(80.9% 0.052 253.9)
-
Step 400
400
#7DA4D3
oklch(70.8% 0.081 253.5)
-
Step 500
500
#5B8CC7
oklch(63% 0.104 253.8)
-
Step 600
600
#4075B4
oklch(55.5% 0.114 254)
-
Step 700
700
#32629B
oklch(49.1% 0.106 254.1)
-
Step 800
800 (this color)
#284E7B
oklch(41.9% 0.087 254)
-
Step 900
900
#274365
oklch(37.8% 0.068 254.1)
-
Step 950
950
#17273B
oklch(26.9% 0.043 254.6)
#284E7B 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) | #3A517D | 0.024 |
| Deuteranopia (no green cones) | #2F497A | 0.015 |
| Tritanopia (no blue cones) | #00585E | 0.070 |
| Achromatopsia (no color) | #4D4D4D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284E7B
#284E7B
oklch(41.9% 0.087 254)
- #694403
#694403
oklch(41.9% 0.088 73.3)
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 #284E7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.019
- Deep Sea Blue #015482 ΔE 0.026
- Dusk Blue #26538D ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.040
- Cobalt #1E488F ΔE 0.042
- Twilight Blue #0A437A ΔE 0.043
- YInMn Blue #415A77 ΔE 0.051
- Dusk #4E5481 ΔE 0.055
Use #284E7B 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.