#2175A9
Closest named color: Nice Blue (#107AB0). oklch(53.9% 0.112 241.3), rgb(33, 117, 169).
Aa
White text reads best on this color (5.02:1).
About this color
#2175A9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.112 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.016 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.18:1 |
| White text | 5.02:1 |
Values
| HEX | #2175A9 |
| RGB | rgb(33, 117, 169) |
| HSL | hsl(203, 67%, 40%) |
| OKLCH | oklch(53.9% 0.112 241.3) |
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 #2175A9 | 5.02:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #2175A9 | 4.18:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #2175A9 text on white | 5.02:1 | AA | Lc 74.3 | Content text, not long reading |
| #2175A9 text on black | 4.18:1 | AA large text | Lc -27.4 | 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 600.
-
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
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A4C5DF
oklch(80.8% 0.051 242)
-
Step 400
400
#72A7CF
oklch(70.7% 0.081 241.9)
-
Step 500
500
#4A91C2
oklch(63.1% 0.103 241.1)
-
Step 600
600 (this color)
#2175A9
oklch(53.9% 0.112 241.3)
-
Step 700
700
#196796
oklch(49.2% 0.104 241.1)
-
Step 800
800
#18547A
oklch(42.7% 0.087 241.4)
-
Step 900
900
#1C4662
oklch(37.8% 0.067 240.9)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#2175A9 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) | #5D76AB | 0.056 |
| Deuteranopia (no green cones) | #4A6AA8 | 0.042 |
| Tritanopia (no blue cones) | #008287 | 0.076 |
| Achromatopsia (no color) | #6F6F6F | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2175A9
#2175A9
oklch(53.9% 0.112 241.3)
- #9C5D1C
#9C5D1C
oklch(53.9% 0.112 61.3)
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 #2175A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.016
- Flat Blue #3C73A8 ΔE 0.019
- Muted Blue #3B719F ΔE 0.022
- Ocean Blue #03719C ΔE 0.026
- Sea Blue #047495 ΔE 0.035
- Dull Blue #49759C ΔE 0.036
- French Blue #436BAD ΔE 0.038
- Mid Blue #276AB3 ΔE 0.038
Use #2175A9 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.