#284D7F
Closest named color: Light Navy (#155084). oklch(41.9% 0.094 256.5), rgb(40, 77, 127).
Aa
White text reads best on this color (8.54:1).
About this color
#284D7F is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.094 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.016 away. White text reads best on it, at 8.54:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #284D7F |
| RGB | rgb(40, 77, 127) |
| HSL | hsl(214, 52%, 33%) |
| OKLCH | oklch(41.9% 0.094 256.5) |
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 #284D7F | 8.54:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #284D7F | 2.45:1 | Fails | Lc 14.8 | Not readable |
| #284D7F text on white | 8.54:1 | AAA | Lc 89.2 | Fine for body text |
| #284D7F text on black | 2.45:1 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC3E4
oklch(81% 0.054 255.4)
-
Step 400
400
#7DA3D7
oklch(70.8% 0.087 256.4)
-
Step 500
500
#5B8BCD
oklch(63.1% 0.113 256.6)
-
Step 600
600
#4074B9
oklch(55.6% 0.122 256.2)
-
Step 700
700
#3261A0
oklch(49.1% 0.114 256.4)
-
Step 800
800 (this color)
#284D7F
oklch(41.9% 0.094 256.5)
-
Step 900
900
#274268
oklch(37.7% 0.073 257.1)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#284D7F 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) | #375181 | 0.022 |
| Deuteranopia (no green cones) | #2A497E | 0.012 |
| Tritanopia (no blue cones) | #005960 | 0.076 |
| Achromatopsia (no color) | #4C4C4C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284D7F
#284D7F
oklch(41.9% 0.094 256.5)
- #674500
#674500
oklch(41.8% 0.088 76.8)
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 #284D7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.016
- Dusk Blue #26538D ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.027
- Cobalt #1E488F ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.055
- Dusk #4E5481 ΔE 0.055
Use #284D7F 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.