#175AD9
Closest named color: Azul (#1D5DEC). oklch(51% 0.205 261.7), rgb(23, 90, 217).
Aa
White text reads best on this color (5.99:1).
About this color
#175AD9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.205 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.031 away. White text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #175AD9 |
| RGB | rgb(23, 90, 217) |
| HSL | hsl(219, 81%, 47%) |
| OKLCH | oklch(51% 0.205 261.7) |
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 #175AD9 | 5.99:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #175AD9 | 3.50:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #175AD9 text on white | 5.99:1 | AA | Lc 79.2 | Fine for body text |
| #175AD9 text on black | 3.50:1 | AA large text | Lc -22.6 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600
#1D66F1
oklch(55.5% 0.221 261.7)
-
Step 700
700 (this color)
#175AD9
oklch(51% 0.205 261.7)
-
Step 800
800
#1146AA
oklch(42.8% 0.17 261.7)
-
Step 900
900
#153C86
oklch(37.7% 0.132 261.6)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#175AD9 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) | #006CDD | 0.044 |
| Deuteranopia (no green cones) | #005BD7 | 0.008 |
| Tritanopia (no blue cones) | #007B91 | 0.157 |
| Achromatopsia (no color) | #636363 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175AD9
#175AD9
oklch(51% 0.205 261.7)
- #845F00
#845F00
oklch(51.1% 0.105 82)
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 #175AD9, closest first.
No curated palette has a color within ΔE 0.04 of #175AD9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.031
- Warm Blue #4B57DB ΔE 0.045
- Neon Blue #4361EE ΔE 0.053
- Royal Blue #4169E1 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.057
- Bright Blue #0165FC ΔE 0.059
- Electric Blue #0652FF ΔE 0.060
- Blue Blue #2242C7 ΔE 0.061
Use #175AD9 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.