#175688
Closest named color: Deep Sea Blue (#015482). oklch(44.1% 0.103 247.4), rgb(23, 86, 136).
Aa
White text reads best on this color (7.71:1).
About this color
#175688 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.103 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.015 away. White text reads best on it, at 7.71:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.72:1 |
| White text | 7.71:1 |
Values
| HEX | #175688 |
| RGB | rgb(23, 86, 136) |
| HSL | hsl(207, 71%, 31%) |
| OKLCH | oklch(44.1% 0.103 247.4) |
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 #175688 | 7.71:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #175688 | 2.72:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #175688 text on white | 7.71:1 | AAA | Lc 86.4 | Fine for body text |
| #175688 text on black | 2.72:1 | Fails | Lc -15.7 | 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
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A2C5E6
oklch(80.9% 0.06 247)
-
Step 400
400
#6EA6DA
oklch(70.7% 0.097 247.6)
-
Step 500
500
#448FD0
oklch(63.2% 0.123 247.4)
-
Step 600
600
#1F78BD
oklch(55.7% 0.134 247.4)
-
Step 700
700
#0E64A3
oklch(49% 0.125 247.7)
-
Step 800
800 (this color)
#175688
oklch(44.1% 0.103 247.4)
-
Step 900
900
#18446A
oklch(37.6% 0.081 248)
-
Step 950
950
#10283E
oklch(27% 0.051 248.4)
#175688 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) | #3E588A | 0.037 |
| Deuteranopia (no green cones) | #2E4E87 | 0.027 |
| Tritanopia (no blue cones) | #006268 | 0.074 |
| Achromatopsia (no color) | #535353 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175688
#175688
oklch(44.1% 0.103 247.4)
- #754600
#754600
oklch(43.9% 0.097 67.3)
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 #175688, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.015
- Dusk Blue #26538D ΔE 0.016
- Light Navy #155084 ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.040
- Cobalt #1E488F ΔE 0.044
- Peacock Blue #016795 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.051
Use #175688 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.