#284366
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.069 255.5), rgb(40, 67, 102).
Aa
White text reads best on this color (10.07:1).
About this color
#284366 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.069 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.024 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #284366 |
| RGB | rgb(40, 67, 102) |
| HSL | hsl(214, 44%, 28%) |
| OKLCH | oklch(37.9% 0.069 255.5) |
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 #284366 | 10.07:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #284366 | 2.08:1 | Fails | Lc 10.7 | Not readable |
| #284366 text on white | 10.07:1 | AAA | Lc 93.2 | Preferred for body text |
| #284366 text on black | 2.08:1 | Fails | Lc -9.2 | 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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ABC3E2
oklch(80.9% 0.051 254.9)
-
Step 400
400
#7EA3D4
oklch(70.7% 0.083 255.6)
-
Step 500
500
#5D8CC8
oklch(63.2% 0.105 255.1)
-
Step 600
600
#4275B5
oklch(55.7% 0.114 255)
-
Step 700
700
#34629C
oklch(49.2% 0.106 255.2)
-
Step 800
800
#2C507E
oklch(42.7% 0.087 255.4)
-
Step 900
900 (this color)
#284366
oklch(37.9% 0.069 255.5)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#284366 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) | #354567 | 0.019 |
| Deuteranopia (no green cones) | #2D3F65 | 0.013 |
| Tritanopia (no blue cones) | #004B50 | 0.059 |
| Achromatopsia (no color) | #424242 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284366
#284366
oklch(37.9% 0.069 255.5)
- #573C11
#573C11
oklch(37.8% 0.069 75)
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 #284366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.024
- Charcoal #264653 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.051
- Marine Blue #01386A ΔE 0.051
- Light Navy #155084 ΔE 0.057
- Midnight Green #073B4C ΔE 0.060
Use #284366 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.