#2188AB
Closest named color: Blue NCS (#118AB2). oklch(58.6% 0.103 226.3), rgb(33, 136, 171).
Aa
Black text reads best on this color (5.17:1).
About this color
#2188AB is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.103 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.011 away. Black text reads best on it, at 5.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.17:1 |
| White text | 4.05:1 |
Values
| HEX | #2188AB |
| RGB | rgb(33, 136, 171) |
| HSL | hsl(195, 68%, 40%) |
| OKLCH | oklch(58.6% 0.103 226.3) |
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 #2188AB | 4.05:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #2188AB | 5.17:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #2188AB text on white | 4.05:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #2188AB text on black | 5.17:1 | AA | Lc -34.3 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A2C7D8
oklch(80.8% 0.046 227.5)
-
Step 400
400
#6CAAC4
oklch(70.6% 0.074 226.5)
-
Step 500
500
#3F95B5
oklch(63.1% 0.095 225.9)
-
Step 600
600 (this color)
#2188AB
oklch(58.6% 0.103 226.3)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#075770
oklch(42.6% 0.079 226.4)
-
Step 900
900
#14485B
oklch(37.7% 0.062 226.7)
-
Step 950
950
#0E2A35
oklch(26.9% 0.039 226.8)
#2188AB 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) | #7585AD | 0.077 |
| Deuteranopia (no green cones) | #6378AB | 0.068 |
| Tritanopia (no blue cones) | #009294 | 0.054 |
| Achromatopsia (no color) | #7E7E7E | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2188AB
#2188AB
oklch(58.6% 0.103 226.3)
- #AE6745
#AE6745
oklch(58.6% 0.103 45.7)
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 #2188AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.011
- Teal Blue #01889F ΔE 0.022
- Steel Blue #4682B4 ΔE 0.034
- Cool Blue #4984B8 ΔE 0.038
- Cerulean #457B9D ΔE 0.041
- Off Blue #5684AE ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.044
- Nice Blue #107AB0 ΔE 0.046
Use #2188AB 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.