#2181A3
Closest named color: Teal Blue (#01889F). oklch(56.5% 0.099 227.1), rgb(33, 129, 163).
Aa
Black text reads best on this color (4.73:1).
About this color
#2181A3 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.099 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.024 away. Black text reads best on it, at 4.73:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #2181A3 |
| RGB | rgb(33, 129, 163) |
| HSL | hsl(196, 66%, 38%) |
| OKLCH | oklch(56.5% 0.099 227.1) |
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 #2181A3 | 4.43:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #2181A3 | 4.73:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #2181A3 text on white | 4.43:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #2181A3 text on black | 4.73:1 | AA | Lc -31.3 | 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
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#6FAAC3
oklch(70.7% 0.071 226.6)
-
Step 500
500
#4494B4
oklch(63% 0.091 227.2)
-
Step 600
600 (this color)
#2181A3
oklch(56.5% 0.099 227.1)
-
Step 700
700
#0A6A89
oklch(49% 0.092 227.5)
-
Step 800
800
#10576F
oklch(42.7% 0.076 226.5)
-
Step 900
900
#18485A
oklch(37.8% 0.059 226.5)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#2181A3 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) | #6F7FA5 | 0.073 |
| Deuteranopia (no green cones) | #5E72A3 | 0.064 |
| Tritanopia (no blue cones) | #008B8C | 0.055 |
| Achromatopsia (no color) | #787878 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2181A3
#2181A3
oklch(56.5% 0.099 227.1)
- #A56240
#A56240
oklch(56.4% 0.1 46.9)
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 #2181A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.024
- Cerulean #457B9D ΔE 0.027
- Blue NCS #118AB2 ΔE 0.030
- Ocean #017B92 ΔE 0.033
- Nice Blue #107AB0 ΔE 0.034
- Stormy Blue #507B9C ΔE 0.037
- Steel Blue #4682B4 ΔE 0.039
- Dull Blue #49759C ΔE 0.041
Use #2181A3 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.