#2172A0
Closest named color: Ocean Blue (#03719C). oklch(52.6% 0.104 238.9), rgb(33, 114, 160).
Aa
White text reads best on this color (5.27:1).
About this color
#2172A0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.104 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.013 away. White text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.97:1 |
| White text | 5.27:1 |
Values
| HEX | #2172A0 |
| RGB | rgb(33, 114, 160) |
| HSL | hsl(202, 66%, 38%) |
| OKLCH | oklch(52.6% 0.104 238.9) |
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 #2172A0 | 5.27:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #2172A0 | 3.97:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #2172A0 text on white | 5.27:1 | AA | Lc 75.9 | Fine for body text |
| #2172A0 text on black | 3.97:1 | AA large text | Lc -25.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A6C6DC
oklch(81% 0.046 238.2)
-
Step 400
400
#74A8CB
oklch(70.8% 0.075 238.7)
-
Step 500
500
#4D91BD
oklch(63% 0.096 239.1)
-
Step 600
600 (this color)
#2172A0
oklch(52.6% 0.104 238.9)
-
Step 700
700
#1D6791
oklch(49% 0.097 238.8)
-
Step 800
800
#1B5476
oklch(42.6% 0.081 239.3)
-
Step 900
900
#1D465F
oklch(37.7% 0.063 238.4)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#2172A0 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) | #5C72A2 | 0.056 |
| Deuteranopia (no green cones) | #4B669F | 0.046 |
| Tritanopia (no blue cones) | #007E82 | 0.069 |
| Achromatopsia (no color) | #6C6C6C | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2172A0
#2172A0
oklch(52.6% 0.104 238.9)
- #965A24
#965A24
oklch(52.6% 0.104 59.1)
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 #2172A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.013
- Muted Blue #3B719F ΔE 0.018
- Sea Blue #047495 ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.030
- Dull Blue #49759C ΔE 0.035
- Peacock Blue #016795 ΔE 0.039
- Ocean #017B92 ΔE 0.041
Use #2172A0 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.