#284F69
Closest named color: Dark Grey Blue (#29465B). oklch(41.1% 0.062 239.8), rgb(40, 79, 105).
Aa
White text reads best on this color (8.70:1).
About this color
#284F69 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.062 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 8.70:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #284F69 |
| RGB | rgb(40, 79, 105) |
| HSL | hsl(204, 45%, 28%) |
| OKLCH | oklch(41.1% 0.062 239.8) |
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 #284F69 | 8.70:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #284F69 | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #284F69 text on white | 8.70:1 | AAA | Lc 89.7 | Fine for body text |
| #284F69 text on black | 2.41:1 | Fails | Lc -12.6 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#ACC4D6
oklch(80.8% 0.036 240.4)
-
Step 400
400
#80A6C2
oklch(70.7% 0.058 240.6)
-
Step 500
500
#5E90B2
oklch(63.1% 0.074 239.2)
-
Step 600
600
#437A9E
oklch(55.7% 0.081 239.2)
-
Step 700
700
#356687
oklch(49.1% 0.075 240.2)
-
Step 800
800 (this color)
#284F69
oklch(41.1% 0.062 239.8)
-
Step 900
900
#284559
oklch(37.7% 0.049 240)
-
Step 950
950
#182934
oklch(27.1% 0.031 237.8)
#284F69 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) | #434F6A | 0.034 |
| Deuteranopia (no green cones) | #3A4869 | 0.029 |
| Tritanopia (no blue cones) | #005658 | 0.048 |
| Achromatopsia (no color) | #4B4B4B | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F69
#284F69
oklch(41.1% 0.062 239.8)
- #634226
#634226
oklch(41% 0.062 60.1)
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 #284F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal #264653 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.043
- Deep Teal #00555A ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.045
- Light Navy #155084 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.051
- Petrol #005F6A ΔE 0.052
Use #284F69 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.