#11559A
Closest named color: Dusk Blue (#26538D). oklch(44.9% 0.129 253.5), rgb(17, 85, 154).
Aa
White text reads best on this color (7.52:1).
About this color
#11559A is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.129 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.78:1 |
| White text | 7.52:1 |
Values
| HEX | #11559A |
| RGB | rgb(17, 85, 154) |
| HSL | hsl(210, 80%, 34%) |
| OKLCH | oklch(44.9% 0.129 253.5) |
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 #11559A | 7.52:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #11559A | 2.78:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #11559A text on white | 7.52:1 | AAA | Lc 85.6 | Fine for body text |
| #11559A text on black | 2.78:1 | Fails | Lc -16.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF5
oklch(88.4% 0.042 253.8)
-
Step 300
300
#9FC4F1
oklch(80.9% 0.075 253.6)
-
Step 400
400
#68A4EA
oklch(70.7% 0.121 253.2)
-
Step 500
500
#3B8BE4
oklch(63.1% 0.155 253.5)
-
Step 600
600
#0F73D2
oklch(55.6% 0.168 253.5)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800 (this color)
#11559A
oklch(44.9% 0.129 253.5)
-
Step 900
900
#124275
oklch(37.7% 0.101 253.4)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#11559A 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) | #315B9D | 0.032 |
| Deuteranopia (no green cones) | #134F99 | 0.017 |
| Tritanopia (no blue cones) | #006670 | 0.097 |
| Achromatopsia (no color) | #545454 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #11559A
#11559A
oklch(44.9% 0.129 253.5)
- #744B00
#744B00
oklch(44.8% 0.095 73.4)
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 #11559A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Light Navy #155084 ΔE 0.037
- Cobalt #1E488F ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.043
- Peacock Blue #016795 ΔE 0.055
- Dusky Blue #475F94 ΔE 0.061
Use #11559A 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.