#2182C0
Closest named color: Water Blue (#0E87CC). oklch(58.3% 0.128 242.8), rgb(33, 130, 192).
Aa
Black text reads best on this color (5.01:1).
About this color
#2182C0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.128 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #2182C0 |
| RGB | rgb(33, 130, 192) |
| HSL | hsl(203, 71%, 44%) |
| OKLCH | oklch(58.3% 0.128 242.8) |
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 #2182C0 | 4.18:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #2182C0 | 5.01:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #2182C0 text on white | 4.18:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #2182C0 text on black | 5.01:1 | AA | Lc -33.3 | Non-text elements, placeholder text |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E3
oklch(80.9% 0.057 242)
-
Step 400
400
#6CA7D5
oklch(70.6% 0.091 243.1)
-
Step 500
500
#3F91CA
oklch(63.1% 0.117 242.3)
-
Step 600
600 (this color)
#2182C0
oklch(58.3% 0.128 242.8)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#095480
oklch(42.8% 0.098 242.4)
-
Step 900
900
#154567
oklch(37.6% 0.077 243.7)
-
Step 950
950
#0E293C
oklch(27% 0.048 242.2)
#2182C0 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) | #6584C3 | 0.059 |
| Deuteranopia (no green cones) | #4F75BF | 0.045 |
| Tritanopia (no blue cones) | #009198 | 0.087 |
| Achromatopsia (no color) | #7C7C7C | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2182C0
#2182C0
oklch(58.3% 0.128 242.8)
- #AF6711
#AF6711
oklch(58.2% 0.128 62.6)
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 #2182C0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Windows Blue #3778BF ΔE 0.029
- Steel Blue #4682B4 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.033
- Blue NCS #118AB2 ΔE 0.036
- Off Blue #5684AE ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.050
Use #2182C0 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.