#175B81
Closest named color: Light Navy Blue (#2E5A88). oklch(44.9% 0.09 238.7), rgb(23, 91, 129).
Aa
White text reads best on this color (7.36:1).
About this color
#175B81 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.090 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.022 away. White text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.84:1 |
| White text | 7.36:1 |
Values
| HEX | #175B81 |
| RGB | rgb(23, 91, 129) |
| HSL | hsl(202, 70%, 30%) |
| OKLCH | oklch(44.9% 0.09 238.7) |
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 #175B81 | 7.36:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #175B81 | 2.84:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #175B81 text on white | 7.36:1 | AAA | Lc 85.2 | Fine for body text |
| #175B81 text on black | 2.84:1 | Fails | Lc -16.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6DF
oklch(80.9% 0.052 238.6)
-
Step 400
400
#6DA8CF
oklch(70.6% 0.084 238.5)
-
Step 500
500
#4292C3
oklch(63.1% 0.107 238.7)
-
Step 600
600
#197BB0
oklch(55.5% 0.117 239.2)
-
Step 700
700
#056897
oklch(49.2% 0.108 238.6)
-
Step 800
800 (this color)
#175B81
oklch(44.9% 0.09 238.7)
-
Step 900
900
#164662
oklch(37.6% 0.07 238.5)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#175B81 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) | #495B83 | 0.049 |
| Deuteranopia (no green cones) | #3B5180 | 0.040 |
| Tritanopia (no blue cones) | #006568 | 0.060 |
| Achromatopsia (no color) | #565656 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175B81
#175B81
oklch(44.9% 0.09 238.7)
- #79471A
#79471A
oklch(44.9% 0.09 58.9)
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 #175B81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.022
- Deep Sea Blue #015482 ΔE 0.025
- Dusk Blue #26538D ΔE 0.035
- Light Navy #155084 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.039
- Peacock Blue #016795 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.044
- Denim #3B638C ΔE 0.044
Use #175B81 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.