#11428D
Closest named color: Cobalt (#1E488F). oklch(39.5% 0.135 259.4), rgb(17, 66, 141).
Aa
White text reads best on this color (9.59:1).
About this color
#11428D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.135 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 9.59:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.18:1 |
| White text | 9.59:1 |
Values
| HEX | #11428D |
| RGB | rgb(17, 66, 141) |
| HSL | hsl(216, 78%, 31%) |
| OKLCH | oklch(39.5% 0.135 259.4) |
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 #11428D | 9.59:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #11428D | 2.18:1 | Fails | Lc 12.3 | Not readable |
| #11428D text on white | 9.59:1 | AAA | Lc 91.7 | Preferred for body text |
| #11428D text on black | 2.18:1 | Fails | Lc -10.7 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#64A0FF
oklch(70.8% 0.153 259.2)
-
Step 500
500
#3584FF
oklch(63.2% 0.199 259.3)
-
Step 600
600
#0069F0
oklch(55.7% 0.219 259.3)
-
Step 700
700
#0058CC
oklch(49.2% 0.194 259.3)
-
Step 800
800
#0047A9
oklch(42.7% 0.169 259.5)
-
Step 900
900 (this color)
#11428D
oklch(39.5% 0.135 259.4)
-
Step 950
950
#09244F
oklch(26.9% 0.086 259.6)
#11428D 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) | #0C4B90 | 0.025 |
| Deuteranopia (no green cones) | #00408C | 0.011 |
| Tritanopia (no blue cones) | #005461 | 0.102 |
| Achromatopsia (no color) | #454545 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #11428D
#11428D
oklch(39.5% 0.135 259.4)
- #5D4000
#5D4000
oklch(39.4% 0.082 79.6)
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 #11428D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Twilight Blue #0A437A ΔE 0.033
- Light Navy #155084 ΔE 0.046
- Dusk Blue #26538D ΔE 0.054
- Sapphire #2138AB ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.058
- Blueberry #464196 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.064
Use #11428D 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.