#28405E
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.06 254.6), rgb(40, 64, 94).
Aa
White text reads best on this color (10.57:1).
About this color
#28405E is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.060 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 10.57:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.57:1 |
Values
| HEX | #28405E |
| RGB | rgb(40, 64, 94) |
| HSL | hsl(213, 40%, 26%) |
| OKLCH | oklch(36.6% 0.06 254.6) |
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 #28405E | 10.57:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #28405E | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #28405E text on white | 10.57:1 | AAA | Lc 94.4 | Preferred for body text |
| #28405E 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
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DE
oklch(80.9% 0.045 253.6)
-
Step 400
400
#82A3CD
oklch(70.6% 0.072 254.7)
-
Step 500
500
#628CC1
oklch(63.1% 0.093 254.7)
-
Step 600
600
#4875AD
oklch(55.5% 0.101 254.7)
-
Step 700
700
#3A6295
oklch(49.1% 0.094 255.2)
-
Step 800
800
#305078
oklch(42.6% 0.077 254.7)
-
Step 900
900 (this color)
#28405E
oklch(36.6% 0.06 254.6)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#28405E 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) | #34425F | 0.018 |
| Deuteranopia (no green cones) | #2D3C5D | 0.013 |
| Tritanopia (no blue cones) | #09474B | 0.053 |
| Achromatopsia (no color) | #3F3F3F | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28405E
#28405E
oklch(36.6% 0.06 254.6)
- #513A17
#513A17
oklch(36.7% 0.06 75.3)
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 #28405E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.040
- Midnight Green #073B4C ΔE 0.048
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.050
- Onyx #343A40 ΔE 0.052
Use #28405E 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.