#17508F
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.119 254.2), rgb(23, 80, 143).
Aa
White text reads best on this color (8.13:1).
About this color
#17508F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.119 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.016 away. White text reads best on it, at 8.13:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #17508F |
| RGB | rgb(23, 80, 143) |
| HSL | hsl(212, 72%, 33%) |
| OKLCH | oklch(43.1% 0.119 254.2) |
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 #17508F | 8.13:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #17508F | 2.58:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #17508F text on white | 8.13:1 | AAA | Lc 87.7 | Fine for body text |
| #17508F text on black | 2.58:1 | Fails | Lc -14.4 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C4ED
oklch(81% 0.069 253.4)
-
Step 400
400
#6FA4E5
oklch(70.8% 0.111 254.2)
-
Step 500
500
#468BDD
oklch(63.1% 0.142 254.3)
-
Step 600
600
#2473CB
oklch(55.5% 0.155 254.4)
-
Step 700
700
#1660AF
oklch(49% 0.144 254.3)
-
Step 800
800 (this color)
#17508F
oklch(43.1% 0.119 254.2)
-
Step 900
900
#1A4271
oklch(37.7% 0.092 254.4)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#17508F 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) | #305591 | 0.028 |
| Deuteranopia (no green cones) | #194A8E | 0.017 |
| Tritanopia (no blue cones) | #005F68 | 0.090 |
| Achromatopsia (no color) | #4F4F4F | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17508F
#17508F
oklch(43.1% 0.119 254.2)
- #6D4700
#6D4700
oklch(43% 0.091 74.3)
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 #17508F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.016
- Light Navy #155084 ΔE 0.019
- Cobalt #1E488F ΔE 0.022
- Deep Sea Blue #015482 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Twilight #4E518B ΔE 0.061
Use #17508F 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.