#175D8B
Closest named color: Light Navy Blue (#2E5A88). oklch(46% 0.1 243.1), rgb(23, 93, 139).
Aa
White text reads best on this color (7.05:1).
About this color
#175D8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.100 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 7.05:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #175D8B |
| RGB | rgb(23, 93, 139) |
| HSL | hsl(204, 72%, 32%) |
| OKLCH | oklch(46% 0.1 243.1) |
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 #175D8B | 7.05:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #175D8B | 2.97:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #175D8B text on white | 7.05:1 | AAA | Lc 84.1 | Fine for body text |
| #175D8B text on black | 2.97:1 | Fails | Lc -17.9 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A6C5DE
oklch(80.9% 0.049 242.6)
-
Step 400
400
#76A7CD
oklch(70.8% 0.077 242.4)
-
Step 500
500
#5090C1
oklch(63.1% 0.099 243.4)
-
Step 600
600
#3179AD
oklch(55.5% 0.108 243.5)
-
Step 700
700 (this color)
#175D8B
oklch(46% 0.1 243.1)
-
Step 800
800
#1F5379
oklch(42.6% 0.084 243.9)
-
Step 900
900
#1F4561
oklch(37.6% 0.065 243)
-
Step 950
950
#132939
oklch(27.1% 0.041 242)
#175D8B 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) | #475E8D | 0.045 |
| Deuteranopia (no green cones) | #37548A | 0.034 |
| Tritanopia (no blue cones) | #00686D | 0.069 |
| Achromatopsia (no color) | #595959 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175D8B
#175D8B
oklch(46% 0.1 243.1)
- #7E4A0A
#7E4A0A
oklch(46% 0.1 63.8)
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 #175D8B, 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
- Peacock Blue #016795 ΔE 0.030
- Dusk Blue #26538D ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.033
- Denim #3B638C ΔE 0.037
- Light Navy #155084 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.045
Use #175D8B 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.