#2172BB
Closest named color: Mid Blue (#276AB3). oklch(54.2% 0.137 250.3), rgb(33, 114, 187).
Aa
White text reads best on this color (5.01:1).
About this color
#2172BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.137 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.023 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #2172BB |
| RGB | rgb(33, 114, 187) |
| HSL | hsl(208, 70%, 43%) |
| OKLCH | oklch(54.2% 0.137 250.3) |
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 #2172BB | 5.01:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #2172BB | 4.18:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #2172BB text on white | 5.01:1 | AA | Lc 74.2 | Content text, not long reading |
| #2172BB text on black | 4.18:1 | AA large text | Lc -27.5 | 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
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E8
oklch(80.8% 0.062 250.8)
-
Step 400
400
#70A5DC
oklch(70.7% 0.099 250.2)
-
Step 500
500
#488DD2
oklch(63% 0.126 250.5)
-
Step 600
600 (this color)
#2172BB
oklch(54.2% 0.137 250.3)
-
Step 700
700
#1863A5
oklch(49.1% 0.127 250.3)
-
Step 800
800
#175186
oklch(42.7% 0.106 250.3)
-
Step 900
900
#1B446B
oklch(37.8% 0.081 249.9)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#2172BB 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) | #4F77BE | 0.043 |
| Deuteranopia (no green cones) | #3669BA | 0.026 |
| Tritanopia (no blue cones) | #00838D | 0.100 |
| Achromatopsia (no color) | #6F6F6F | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2172BB
#2172BB
oklch(54.2% 0.137 250.3)
- #9A6100
#9A6100
oklch(54.2% 0.117 70)
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 #2172BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.023
- Windows Blue #3778BF ΔE 0.025
- Nice Blue #107AB0 ΔE 0.032
- French Blue #436BAD ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.035
- Muted Blue #3B719F ΔE 0.046
- Ocean Blue #03719C ΔE 0.052
- Dull Blue #49759C ΔE 0.059
Use #2172BB 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.