#28455E
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.055 246), rgb(40, 69, 94).
Aa
White text reads best on this color (9.98:1).
About this color
#28455E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.055 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.007 away. White text reads best on it, at 9.98:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.10:1 |
| White text | 9.98:1 |
Values
| HEX | #28455E |
| RGB | rgb(40, 69, 94) |
| HSL | hsl(208, 40%, 26%) |
| OKLCH | oklch(37.9% 0.055 246) |
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 #28455E | 9.98:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #28455E | 2.10:1 | Fails | Lc 10.9 | Not readable |
| #28455E text on white | 9.98:1 | AAA | Lc 93.1 | Preferred for body text |
| #28455E text on black | 2.10:1 | Fails | Lc -9.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#ABC4DA
oklch(80.9% 0.041 244.9)
-
Step 400
400
#7EA5C8
oklch(70.6% 0.067 246)
-
Step 500
500
#5D8FBA
oklch(63.2% 0.085 245.6)
-
Step 600
600
#4278A6
oklch(55.6% 0.092 246.2)
-
Step 700
700
#33658E
oklch(49.1% 0.085 245.5)
-
Step 800
800
#2B5274
oklch(42.6% 0.072 246.8)
-
Step 900
900 (this color)
#28455E
oklch(37.9% 0.055 246)
-
Step 950
950
#182837
oklch(27% 0.035 247.7)
#28455E 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) | #3A455F | 0.024 |
| Deuteranopia (no green cones) | #33405E | 0.020 |
| Tritanopia (no blue cones) | #074B4E | 0.046 |
| Achromatopsia (no color) | #424242 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28455E
#28455E
oklch(37.9% 0.055 246)
- #563C20
#563C20
oklch(37.9% 0.056 66.8)
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 #28455E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.007
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Teal #014D4E ΔE 0.051
- Twilight Blue #0A437A ΔE 0.054
- Midnight Green #073B4C ΔE 0.054
Use #28455E 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.