#28445A
Closest named color: Dark Grey Blue (#29465B). oklch(37.5% 0.051 243.4), rgb(40, 68, 90).
Aa
White text reads best on this color (10.17:1).
About this color
#28445A is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.051 and its hue 243°. 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 10.17:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.17:1 |
Values
| HEX | #28445A |
| RGB | rgb(40, 68, 90) |
| HSL | hsl(206, 38%, 25%) |
| OKLCH | oklch(37.5% 0.051 243.4) |
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 #28445A | 10.17:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #28445A | 2.06:1 | Fails | Lc 10.4 | Not readable |
| #28445A text on white | 10.17:1 | AAA | Lc 93.5 | Preferred for body text |
| #28445A text on black | 2.06:1 | Fails | Lc -9.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ACC4D8
oklch(80.9% 0.039 243.3)
-
Step 400
400
#80A6C4
oklch(70.8% 0.061 242.5)
-
Step 500
500
#5F8FB5
oklch(63.1% 0.078 243.3)
-
Step 600
600
#4479A1
oklch(55.6% 0.084 242.9)
-
Step 700
700
#35658A
oklch(49% 0.079 243.7)
-
Step 800
800
#2D5370
oklch(42.7% 0.065 243.2)
-
Step 900
900 (this color)
#28445A
oklch(37.5% 0.051 243.4)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#28445A 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) | #3B445B | 0.026 |
| Deuteranopia (no green cones) | #343F5A | 0.021 |
| Tritanopia (no blue cones) | #0D494B | 0.042 |
| Achromatopsia (no color) | #414141 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28445A
#28445A
oklch(37.5% 0.051 243.4)
- #543B23
#543B23
oklch(37.5% 0.051 64)
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 #28445A, 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 0.016
- Dark Blue Grey #1F3B4D ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.047
- Onyx #343A40 ΔE 0.048
- Dark Teal #014D4E ΔE 0.048
- Midnight Green #073B4C ΔE 0.049
Use #28445A 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.