#284F70
Closest named color: Deep Sea Blue (#015482). oklch(41.5% 0.071 246.2), rgb(40, 79, 112).
Aa
White text reads best on this color (8.59:1).
About this color
#284F70 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.071 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.034 away. White text reads best on it, at 8.59:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #284F70 |
| RGB | rgb(40, 79, 112) |
| HSL | hsl(207, 47%, 30%) |
| OKLCH | oklch(41.5% 0.071 246.2) |
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 #284F70 | 8.59:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #284F70 | 2.44:1 | Fails | Lc 14.6 | Not readable |
| #284F70 text on white | 8.59:1 | AAA | Lc 89.4 | Fine for body text |
| #284F70 text on black | 2.44:1 | Fails | Lc -12.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DA
oklch(80.9% 0.041 244.9)
-
Step 400
400
#7FA5C8
oklch(70.7% 0.066 246.7)
-
Step 500
500
#5D8FBA
oklch(63.2% 0.085 245.6)
-
Step 600
600
#4278A6
oklch(55.6% 0.092 246.2)
-
Step 700
700
#33658E
oklch(49.1% 0.085 245.5)
-
Step 800
800 (this color)
#284F70
oklch(41.5% 0.071 246.2)
-
Step 900
900
#28445D
oklch(37.6% 0.055 246.8)
-
Step 950
950
#182837
oklch(27% 0.035 247.7)
#284F70 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) | #415071 | 0.031 |
| Deuteranopia (no green cones) | #37496F | 0.023 |
| Tritanopia (no blue cones) | #00575A | 0.057 |
| Achromatopsia (no color) | #4C4C4C | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F70
#284F70
oklch(41.5% 0.071 246.2)
- #66431D
#66431D
oklch(41.5% 0.072 65.7)
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 #284F70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.034
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.040
- Dusk Blue #26538D ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.051
- Charcoal #264653 ΔE 0.052
Use #284F70 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.