#284066
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.072 259.3), rgb(40, 64, 102).
Aa
White text reads best on this color (10.41:1).
About this color
#284066 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.072 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 10.41:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.41:1 |
Values
| HEX | #284066 |
| RGB | rgb(40, 64, 102) |
| HSL | hsl(217, 44%, 28%) |
| OKLCH | oklch(37.1% 0.072 259.3) |
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 #284066 | 10.41:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #284066 | 2.01:1 | Fails | Lc 9.9 | Not readable |
| #284066 text on white | 10.41:1 | AAA | Lc 94.0 | Preferred for body text |
| #284066 text on black | 2.01:1 | Fails | Lc -8.5 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#80A2D7
oklch(70.7% 0.087 259.1)
-
Step 500
500
#608ACC
oklch(63.1% 0.11 259.1)
-
Step 600
600
#4673B9
oklch(55.7% 0.12 258.9)
-
Step 700
700
#38609F
oklch(49.1% 0.111 259.1)
-
Step 800
800
#2F4F81
oklch(42.8% 0.092 259)
-
Step 900
900 (this color)
#284066
oklch(37.1% 0.072 259.3)
-
Step 950
950
#19273D
oklch(27.2% 0.046 259.2)
#284066 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) | #304368 | 0.015 |
| Deuteranopia (no green cones) | #283D65 | 0.009 |
| Tritanopia (no blue cones) | #00484E | 0.063 |
| Achromatopsia (no color) | #404040 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284066
#284066
oklch(37.1% 0.072 259.3)
- #543B07
#543B07
oklch(37.1% 0.072 79.9)
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 #284066, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Twilight Blue #0A437A ΔE 0.039
- Charcoal #264653 ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.044
- Marine Blue #01386A ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.046
- Midnight Green #073B4C ΔE 0.058
- Light Navy #155084 ΔE 0.062
Use #284066 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.