#28405D
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.059 253.9), rgb(40, 64, 93).
Aa
White text reads best on this color (10.59:1).
About this color
#28405D is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.059 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 10.59:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.59:1 |
Values
| HEX | #28405D |
| RGB | rgb(40, 64, 93) |
| HSL | hsl(213, 40%, 26%) |
| OKLCH | oklch(36.6% 0.059 253.9) |
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 #28405D | 10.59:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #28405D | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #28405D text on white | 10.59:1 | AAA | Lc 94.5 | Preferred for body text |
| #28405D text on black | 1.98:1 | Fails | Lc -8.1 | 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
#E4EAF2
oklch(93.5% 0.013 255.5)
-
Step 200
200
#CEDAE9
oklch(88.4% 0.024 254)
-
Step 300
300
#ADC3DD
oklch(80.9% 0.044 252.7)
-
Step 400
400
#82A3CC
oklch(70.6% 0.071 254.1)
-
Step 500
500
#628CBF
oklch(63% 0.09 253.9)
-
Step 600
600
#4976AB
oklch(55.7% 0.097 253.4)
-
Step 700
700
#3A6393
oklch(49.2% 0.09 253.4)
-
Step 800
800
#305177
oklch(42.8% 0.075 253)
-
Step 900
900 (this color)
#28405D
oklch(36.6% 0.059 253.9)
-
Step 950
950
#192738
oklch(26.9% 0.037 253.8)
#28405D 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) | #34415E | 0.017 |
| Deuteranopia (no green cones) | #2E3C5C | 0.014 |
| Tritanopia (no blue cones) | #0A474A | 0.053 |
| Achromatopsia (no color) | #3F3F3F | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28405D
#28405D
oklch(36.6% 0.059 253.9)
- #513A18
#513A18
oklch(36.7% 0.059 74.7)
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 #28405D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.039
- Midnight Green #073B4C ΔE 0.046
- Onyx #343A40 ΔE 0.050
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.052
Use #28405D 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.