#28436D
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.079 258.9), rgb(40, 67, 109).
Aa
White text reads best on this color (9.93:1).
About this color
#28436D is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.079 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #28436D |
| RGB | rgb(40, 67, 109) |
| HSL | hsl(217, 46%, 29%) |
| OKLCH | oklch(38.3% 0.079 258.9) |
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 #28436D | 9.93:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #28436D | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #28436D text on white | 9.93:1 | AAA | Lc 92.9 | Preferred for body text |
| #28436D text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#AAC2E8
oklch(80.9% 0.06 259.5)
-
Step 400
400
#7CA2DC
oklch(70.7% 0.095 258.6)
-
Step 500
500
#5B8AD2
oklch(63.2% 0.121 258.7)
-
Step 600
600
#4072C0
oklch(55.6% 0.133 259)
-
Step 700
700
#325FA5
oklch(49% 0.123 259)
-
Step 800
800
#2A4E86
oklch(42.7% 0.102 259)
-
Step 900
900 (this color)
#28436D
oklch(38.3% 0.079 258.9)
-
Step 950
950
#17273F
oklch(27.2% 0.05 258.3)
#28436D 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) | #31466F | 0.016 |
| Deuteranopia (no green cones) | #28406C | 0.009 |
| Tritanopia (no blue cones) | #004C52 | 0.068 |
| Achromatopsia (no color) | #434343 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28436D
#28436D
oklch(38.3% 0.079 258.9)
- #5A3D00
#5A3D00
oklch(38.3% 0.08 78.5)
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 #28436D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.035
- Light Navy #155084 ΔE 0.049
- Charcoal #264653 ΔE 0.049
- Marine Blue #01386A ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.057
- Cobalt #1E488F ΔE 0.057
Use #28436D 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.