#175BA5
Closest named color: Denim Blue (#3B5B92). oklch(47.2% 0.136 254.3), rgb(23, 91, 165).
Aa
White text reads best on this color (6.82:1).
About this color
#175BA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.136 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.041 away. White text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #175BA5 |
| RGB | rgb(23, 91, 165) |
| HSL | hsl(211, 76%, 37%) |
| OKLCH | oklch(47.2% 0.136 254.3) |
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 #175BA5 | 6.82:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #175BA5 | 3.07:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #175BA5 text on white | 6.82:1 | AA | Lc 83.1 | Fine for body text |
| #175BA5 text on black | 3.07:1 | AA large text | Lc -18.9 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A4C3EB
oklch(80.8% 0.066 254.9)
-
Step 400
400
#72A4E1
oklch(70.8% 0.105 254)
-
Step 500
500
#4B8BD9
oklch(63% 0.135 254.6)
-
Step 600
600
#2C74C6
oklch(55.7% 0.146 254.2)
-
Step 700
700 (this color)
#175BA5
oklch(47.2% 0.136 254.3)
-
Step 800
800
#1B4F8B
oklch(42.7% 0.113 254.5)
-
Step 900
900
#1D426F
oklch(37.6% 0.088 254.8)
-
Step 950
950
#122741
oklch(27% 0.056 254.8)
#175BA5 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) | #3461A8 | 0.030 |
| Deuteranopia (no green cones) | #1555A4 | 0.017 |
| Tritanopia (no blue cones) | #006D78 | 0.102 |
| Achromatopsia (no color) | #5B5B5B | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175BA5
#175BA5
oklch(47.2% 0.136 254.3)
- #7C5100
#7C5100
oklch(47.1% 0.1 73.9)
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 #175BA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.041
- Dusk Blue #26538D ΔE 0.042
- Peacock Blue #016795 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.053
- Denim #3B638C ΔE 0.059
- Light Navy #155084 ΔE 0.059
Use #175BA5 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.