#28506A
Closest named color: Dark Grey Blue (#29465B). oklch(41.4% 0.063 239.2), rgb(40, 80, 106).
Aa
White text reads best on this color (8.58:1).
About this color
#28506A is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.063 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 8.58:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #28506A |
| RGB | rgb(40, 80, 106) |
| HSL | hsl(204, 45%, 29%) |
| OKLCH | oklch(41.4% 0.063 239.2) |
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 #28506A | 8.58:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #28506A | 2.44:1 | Fails | Lc 14.6 | Not readable |
| #28506A text on white | 8.58:1 | AAA | Lc 89.4 | Fine for body text |
| #28506A text on black | 2.44:1 | Fails | Lc -12.9 | 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
#CDDBE5
oklch(88.4% 0.02 238.7)
-
Step 300
300
#ACC4D6
oklch(80.8% 0.036 240.4)
-
Step 400
400
#7FA6C2
oklch(70.7% 0.059 239.9)
-
Step 500
500
#5D90B2
oklch(63.1% 0.075 238.8)
-
Step 600
600
#427A9E
oklch(55.6% 0.082 238.8)
-
Step 700
700
#346687
oklch(49% 0.076 239.7)
-
Step 800
800 (this color)
#28506A
oklch(41.4% 0.063 239.2)
-
Step 900
900
#284559
oklch(37.7% 0.049 240)
-
Step 950
950
#182934
oklch(27.1% 0.031 237.8)
#28506A 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) | #44506B | 0.035 |
| Deuteranopia (no green cones) | #3B496A | 0.029 |
| Tritanopia (no blue cones) | #005759 | 0.048 |
| Achromatopsia (no color) | #4C4C4C | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28506A
#28506A
oklch(41.4% 0.063 239.2)
- #654327
#654327
oklch(41.5% 0.063 59.3)
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 #28506A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.042
- Deep Teal #00555A ΔE 0.043
- Charcoal #264653 ΔE 0.045
- Light Navy #155084 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.045
- YInMn Blue #415A77 ΔE 0.048
- Petrol #005F6A ΔE 0.049
Use #28506A 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.