#175A81
Closest named color: Light Navy Blue (#2E5A88). oklch(44.6% 0.091 239.7), rgb(23, 90, 129).
Aa
White text reads best on this color (7.45:1).
About this color
#175A81 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.091 and its hue 240°. 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 7.45:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #175A81 |
| RGB | rgb(23, 90, 129) |
| HSL | hsl(202, 70%, 30%) |
| OKLCH | oklch(44.6% 0.091 239.7) |
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 #175A81 | 7.45:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #175A81 | 2.81:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #175A81 text on white | 7.45:1 | AAA | Lc 85.6 | Fine for body text |
| #175A81 text on black | 2.81:1 | Fails | Lc -16.5 | 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
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6E0
oklch(80.9% 0.053 239.7)
-
Step 400
400
#6EA8D0
oklch(70.7% 0.084 239.7)
-
Step 500
500
#4392C4
oklch(63.2% 0.108 239.4)
-
Step 600
600
#1B7BB1
oklch(55.6% 0.118 240)
-
Step 700
700
#086798
oklch(49% 0.11 240.1)
-
Step 800
800 (this color)
#175A81
oklch(44.6% 0.091 239.7)
-
Step 900
900
#174663
oklch(37.7% 0.071 239.8)
-
Step 950
950
#0F293A
oklch(26.9% 0.045 240)
#175A81 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) | #485A83 | 0.048 |
| Deuteranopia (no green cones) | #395180 | 0.037 |
| Tritanopia (no blue cones) | #006468 | 0.060 |
| Achromatopsia (no color) | #555555 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A81
#175A81
oklch(44.6% 0.091 239.7)
- #784718
#784718
oklch(44.7% 0.09 60.3)
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 #175A81, 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 0.022
- Light Navy #155084 ΔE 0.032
- Dusk Blue #26538D ΔE 0.033
- YInMn Blue #415A77 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.044
- Peacock Blue #016795 ΔE 0.045
- Denim #3B638C ΔE 0.046
Use #175A81 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.