#175C9F
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.127 252.2), rgb(23, 92, 159).
Aa
White text reads best on this color (6.84:1).
About this color
#175C9F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.127 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.034 away. White text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #175C9F |
| RGB | rgb(23, 92, 159) |
| HSL | hsl(210, 75%, 36%) |
| OKLCH | oklch(47% 0.127 252.2) |
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 #175C9F | 6.84:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #175C9F | 3.06:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #175C9F text on white | 6.84:1 | AA | Lc 83.2 | Fine for body text |
| #175C9F text on black | 3.06:1 | AA large text | Lc -18.8 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A5C4E8
oklch(81% 0.061 252.4)
-
Step 400
400
#73A4DC
oklch(70.6% 0.098 252.5)
-
Step 500
500
#4C8DD3
oklch(63.2% 0.125 251.9)
-
Step 600
600
#2D75C0
oklch(55.5% 0.137 252.4)
-
Step 700
700 (this color)
#175C9F
oklch(47% 0.127 252.2)
-
Step 800
800
#1C5086
oklch(42.6% 0.105 252.4)
-
Step 900
900
#1D436B
oklch(37.6% 0.081 251.9)
-
Step 950
950
#12283F
oklch(27.1% 0.051 251.2)
#175C9F 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) | #3A61A2 | 0.034 |
| Deuteranopia (no green cones) | #22559E | 0.019 |
| Tritanopia (no blue cones) | #006C75 | 0.094 |
| Achromatopsia (no color) | #5A5A5A | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175C9F
#175C9F
oklch(47% 0.127 252.2)
- #7D5000
#7D5000
oklch(47.1% 0.101 72.2)
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 #175C9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.034
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.039
- Peacock Blue #016795 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.048
- Denim #3B638C ΔE 0.050
- Mid Blue #276AB3 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.052
Use #175C9F 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.