#284A67
Closest named color: Dark Grey Blue (#29465B). oklch(39.7% 0.063 246), rgb(40, 74, 103).
Aa
White text reads best on this color (9.26:1).
About this color
#284A67 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.063 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #284A67 |
| RGB | rgb(40, 74, 103) |
| HSL | hsl(208, 44%, 28%) |
| OKLCH | oklch(39.7% 0.063 246) |
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 #284A67 | 9.26:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #284A67 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #284A67 text on white | 9.26:1 | AAA | Lc 91.2 | Preferred for body text |
| #284A67 text on black | 2.26:1 | Fails | Lc -11.1 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A8C4DE
oklch(80.8% 0.048 246.4)
-
Step 400
400
#79A6CE
oklch(70.8% 0.076 246)
-
Step 500
500
#558FC1
oklch(63.1% 0.097 246.1)
-
Step 600
600
#3878AD
oklch(55.5% 0.106 246.3)
-
Step 700
700
#2A6595
oklch(49.1% 0.098 246.3)
-
Step 800
800
#245379
oklch(42.8% 0.081 245.8)
-
Step 900
900 (this color)
#284A67
oklch(39.7% 0.063 246)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#284A67 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) | #3E4B68 | 0.028 |
| Deuteranopia (no green cones) | #354466 | 0.022 |
| Tritanopia (no blue cones) | #005154 | 0.052 |
| Achromatopsia (no color) | #474747 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284A67
#284A67
oklch(39.7% 0.063 246)
- #5E401F
#5E401F
oklch(39.8% 0.063 66.8)
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 #284A67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.034
- Light Navy #155084 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.050
- Deep Teal #00555A ΔE 0.052
- Dark Teal #014D4E ΔE 0.056
Use #284A67 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.