#175A87
Closest named color: Light Navy Blue (#2E5A88). oklch(45% 0.098 243.5), rgb(23, 90, 135).
Aa
White text reads best on this color (7.37:1).
About this color
#175A87 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.098 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.017 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #175A87 |
| RGB | rgb(23, 90, 135) |
| HSL | hsl(204, 71%, 31%) |
| OKLCH | oklch(45% 0.098 243.5) |
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 #175A87 | 7.37:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #175A87 | 2.84:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #175A87 text on white | 7.37:1 | AAA | Lc 85.2 | Fine for body text |
| #175A87 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
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C6E3
oklch(81% 0.056 242.7)
-
Step 400
400
#6DA7D6
oklch(70.7% 0.092 244.1)
-
Step 500
500
#4190CA
oklch(63% 0.117 243.5)
-
Step 600
600
#187AB7
oklch(55.7% 0.126 243)
-
Step 700
700
#05669E
oklch(49.1% 0.118 243.6)
-
Step 800
800 (this color)
#175A87
oklch(45% 0.098 243.5)
-
Step 900
900
#164567
oklch(37.6% 0.077 244.1)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#175A87 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) | #455B89 | 0.044 |
| Deuteranopia (no green cones) | #355186 | 0.033 |
| Tritanopia (no blue cones) | #00656A | 0.068 |
| Achromatopsia (no color) | #565656 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A87
#175A87
oklch(45% 0.098 243.5)
- #7A4709
#7A4709
oklch(44.9% 0.098 63.3)
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 #175A87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.023
- Dusk Blue #26538D ΔE 0.026
- Light Navy #155084 ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.037
- Peacock Blue #016795 ΔE 0.040
- Denim #3B638C ΔE 0.044
- YInMn Blue #415A77 ΔE 0.044
Use #175A87 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.