#284055
Closest named color: Dark Grey Blue (#29465B). oklch(36.2% 0.047 246), rgb(40, 64, 85).
Aa
White text reads best on this color (10.74:1).
About this color
#284055 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.047 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.020 away. White text reads best on it, at 10.74:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #284055 |
| RGB | rgb(40, 64, 85) |
| HSL | hsl(208, 36%, 25%) |
| OKLCH | oklch(36.2% 0.047 246) |
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 #284055 | 10.74:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #284055 | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #284055 text on white | 10.74:1 | AAA | Lc 94.8 | Preferred for body text |
| #284055 text on black | 1.95:1 | Fails | Lc -7.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D7
oklch(80.8% 0.036 248.3)
-
Step 400
400
#84A5C2
oklch(70.8% 0.056 245.2)
-
Step 500
500
#648EB3
oklch(63.1% 0.073 245.9)
-
Step 600
600
#4B789F
oklch(55.7% 0.079 246)
-
Step 700
700
#3C6588
oklch(49.2% 0.073 245.8)
-
Step 800
800
#32526E
oklch(42.6% 0.06 246.2)
-
Step 900
900 (this color)
#284055
oklch(36.2% 0.047 246)
-
Step 950
950
#1A2834
oklch(27% 0.03 245.1)
#284055 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) | #374056 | 0.021 |
| Deuteranopia (no green cones) | #313C55 | 0.017 |
| Tritanopia (no blue cones) | #134547 | 0.040 |
| Achromatopsia (no color) | #3E3E3E | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284055
#284055
oklch(36.2% 0.047 246)
- #4F3822
#4F3822
oklch(36.1% 0.048 64.1)
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 #284055, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.020
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.024
- Onyx #343A40 ΔE 0.038
- Midnight Green #073B4C ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.043
- Gunmetal #293241 ΔE 0.050
Use #284055 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.