#2176BF
Closest named color: Windows Blue (#3778BF). oklch(55.4% 0.138 249.4), rgb(33, 118, 191).
Aa
White text reads best on this color (4.76:1).
About this color
#2176BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.138 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.016 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #2176BF |
| RGB | rgb(33, 118, 191) |
| HSL | hsl(208, 71%, 44%) |
| OKLCH | oklch(55.4% 0.138 249.4) |
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 #2176BF | 4.76:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #2176BF | 4.40:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #2176BF text on white | 4.76:1 | AA | Lc 72.6 | Content text, not long reading |
| #2176BF text on black | 4.40:1 | AA large text | Lc -29.1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C5E8
oklch(81% 0.062 248.6)
-
Step 400
400
#6FA5DC
oklch(70.6% 0.099 249.8)
-
Step 500
500
#468ED2
oklch(63.1% 0.126 249.3)
-
Step 600
600 (this color)
#2176BF
oklch(55.4% 0.138 249.4)
-
Step 700
700
#1263A5
oklch(49% 0.128 249.4)
-
Step 800
800
#145186
oklch(42.6% 0.106 249.7)
-
Step 900
900
#19446B
oklch(37.7% 0.082 249.1)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#2176BF 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) | #537AC2 | 0.045 |
| Deuteranopia (no green cones) | #3A6CBE | 0.029 |
| Tritanopia (no blue cones) | #008891 | 0.101 |
| Achromatopsia (no color) | #737373 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2176BF
#2176BF
oklch(55.4% 0.138 249.4)
- #9F6400
#9F6400
oklch(55.5% 0.12 69.8)
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 #2176BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.016
- Nice Blue #107AB0 ΔE 0.029
- Mid Blue #276AB3 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.038
- French Blue #436BAD ΔE 0.041
- Water Blue #0E87CC ΔE 0.048
- Muted Blue #3B719F ΔE 0.050
- Steel Blue #4682B4 ΔE 0.052
Use #2176BF 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.