#2182B4
Closest named color: Blue NCS (#118AB2). oklch(57.6% 0.115 237.1), rgb(33, 130, 180).
Aa
Black text reads best on this color (4.91:1).
About this color
#2182B4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.115 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.024 away. Black text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #2182B4 |
| RGB | rgb(33, 130, 180) |
| HSL | hsl(200, 69%, 42%) |
| OKLCH | oklch(57.6% 0.115 237.1) |
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 #2182B4 | 4.27:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #2182B4 | 4.91:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #2182B4 text on white | 4.27:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #2182B4 text on black | 4.91:1 | AA | Lc -32.5 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEA
oklch(88.4% 0.029 238.3)
-
Step 300
300
#A2C6DE
oklch(80.8% 0.051 237.5)
-
Step 400
400
#6DA9CE
oklch(70.8% 0.083 236.7)
-
Step 500
500
#4192C1
oklch(63% 0.106 237.3)
-
Step 600
600 (this color)
#2182B4
oklch(57.6% 0.115 237.1)
-
Step 700
700
#026895
oklch(49% 0.107 237.2)
-
Step 800
800
#0C5579
oklch(42.7% 0.088 237.2)
-
Step 900
900
#164661
oklch(37.6% 0.069 237.5)
-
Step 950
950
#0F2939
oklch(26.9% 0.044 238.4)
#2182B4 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) | #6A82B6 | 0.065 |
| Deuteranopia (no green cones) | #5674B3 | 0.053 |
| Tritanopia (no blue cones) | #008F93 | 0.074 |
| Achromatopsia (no color) | #7A7A7A | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2182B4
#2182B4
oklch(57.6% 0.115 237.1)
- #AB662C
#AB662C
oklch(57.7% 0.114 57.4)
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 #2182B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.024
- Steel Blue #4682B4 ΔE 0.025
- Nice Blue #107AB0 ΔE 0.025
- Cool Blue #4984B8 ΔE 0.030
- Water Blue #0E87CC ΔE 0.037
- Windows Blue #3778BF ΔE 0.038
- Cerulean #457B9D ΔE 0.040
- Off Blue #5684AE ΔE 0.043
Use #2182B4 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.