#175586
Closest named color: Deep Sea Blue (#015482). oklch(43.7% 0.101 247.2), rgb(23, 85, 134).
Aa
White text reads best on this color (7.83:1).
About this color
#175586 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.101 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.012 away. White text reads best on it, at 7.83:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #175586 |
| RGB | rgb(23, 85, 134) |
| HSL | hsl(206, 71%, 31%) |
| OKLCH | oklch(43.7% 0.101 247.2) |
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 #175586 | 7.83:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #175586 | 2.68:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #175586 text on white | 7.83:1 | AAA | Lc 86.8 | Fine for body text |
| #175586 text on black | 2.68:1 | Fails | Lc -15.3 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A3C5E5
oklch(80.9% 0.058 247)
-
Step 400
400
#6FA6D9
oklch(70.7% 0.095 247.5)
-
Step 500
500
#458FCE
oklch(63.1% 0.12 246.9)
-
Step 600
600
#2178BC
oklch(55.7% 0.132 247.3)
-
Step 700
700
#1164A2
oklch(49% 0.123 247.6)
-
Step 800
800 (this color)
#175586
oklch(43.7% 0.101 247.2)
-
Step 900
900
#194469
oklch(37.6% 0.079 247.8)
-
Step 950
950
#10283D
oklch(26.9% 0.05 247.3)
#175586 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) | #3E5788 | 0.038 |
| Deuteranopia (no green cones) | #2E4D85 | 0.027 |
| Tritanopia (no blue cones) | #006167 | 0.073 |
| Achromatopsia (no color) | #525252 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175586
#175586
oklch(43.7% 0.101 247.2)
- #744500
#744500
oklch(43.6% 0.096 66.9)
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 #175586, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.012
- Light Navy #155084 ΔE 0.015
- Dusk Blue #26538D ΔE 0.018
- Light Navy Blue #2E5A88 ΔE 0.025
- Cobalt #1E488F ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.043
- YInMn Blue #415A77 ΔE 0.051
- Peacock Blue #016795 ΔE 0.054
Use #175586 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.