#2183BD
Closest named color: Water Blue (#0E87CC). oklch(58.3% 0.124 240.8), rgb(33, 131, 189).
Aa
Black text reads best on this color (5.04:1).
About this color
#2183BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.124 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.023 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #2183BD |
| RGB | rgb(33, 131, 189) |
| HSL | hsl(202, 70%, 44%) |
| OKLCH | oklch(58.3% 0.124 240.8) |
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 #2183BD | 4.16:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #2183BD | 5.04:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #2183BD text on white | 4.16:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #2183BD text on black | 5.04:1 | AA | Lc -33.4 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6CA8D3
oklch(70.7% 0.089 240.8)
-
Step 500
500
#3F91C7
oklch(63% 0.114 240.8)
-
Step 600
600 (this color)
#2183BD
oklch(58.3% 0.124 240.8)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#09547E
oklch(42.7% 0.096 241.2)
-
Step 900
900
#144665
oklch(37.7% 0.074 240.5)
-
Step 950
950
#0E293B
oklch(27% 0.047 240.8)
#2183BD 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) | #6784C0 | 0.061 |
| Deuteranopia (no green cones) | #5276BC | 0.048 |
| Tritanopia (no blue cones) | #009197 | 0.082 |
| Achromatopsia (no color) | #7C7C7C | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2183BD
#2183BD
oklch(58.3% 0.124 240.8)
- #AF671E
#AF671E
oklch(58.3% 0.124 60.4)
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 #2183BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.023
- Steel Blue #4682B4 ΔE 0.026
- Cool Blue #4984B8 ΔE 0.028
- Blue NCS #118AB2 ΔE 0.030
- Nice Blue #107AB0 ΔE 0.032
- Windows Blue #3778BF ΔE 0.033
- Off Blue #5684AE ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.049
Use #2183BD 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.