#175DB9
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.16 257.6), rgb(23, 93, 185).
Aa
White text reads best on this color (6.35:1).
About this color
#175DB9 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.160 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.041 away. White text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #175DB9 |
| RGB | rgb(23, 93, 185) |
| HSL | hsl(214, 78%, 41%) |
| OKLCH | oklch(49.1% 0.16 257.6) |
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 #175DB9 | 6.35:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #175DB9 | 3.30:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #175DB9 text on white | 6.35:1 | AA | Lc 81.0 | Fine for body text |
| #175DB9 text on black | 3.30:1 | AA large text | Lc -20.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF6
oklch(88.6% 0.043 257.1)
-
Step 300
300
#A1C3F3
oklch(80.9% 0.078 257)
-
Step 400
400
#6EA2ED
oklch(70.7% 0.124 257.5)
-
Step 500
500
#4688E7
oklch(63% 0.159 257.8)
-
Step 600
600
#2570D5
oklch(55.6% 0.172 257.5)
-
Step 700
700 (this color)
#175DB9
oklch(49.1% 0.16 257.6)
-
Step 800
800
#164C96
oklch(42.6% 0.134 257.8)
-
Step 900
900
#194077
oklch(37.6% 0.104 257.7)
-
Step 950
950
#102646
oklch(27% 0.066 257.9)
#175DB9 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) | #2367BC | 0.029 |
| Deuteranopia (no green cones) | #0059B7 | 0.015 |
| Tritanopia (no blue cones) | #007382 | 0.121 |
| Achromatopsia (no color) | #5F5F5F | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175DB9
#175DB9
oklch(49.1% 0.16 257.6)
- #805800
#805800
oklch(49.1% 0.102 78.1)
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 #175DB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.066
- Blue Blue #2242C7 ΔE 0.068
- Peacock Blue #016795 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.072
- Dusk Blue #26538D ΔE 0.072
- Warm Blue #4B57DB ΔE 0.072
Use #175DB9 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.