#3181A2
Closest named color: Cerulean (#457B9D). oklch(56.9% 0.092 229), rgb(49, 129, 162).
Aa
Black text reads best on this color (4.79:1).
About this color
#3181A2 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.092 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.021 away. Black text reads best on it, at 4.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.79:1 |
| White text | 4.38:1 |
Values
| HEX | #3181A2 |
| RGB | rgb(49, 129, 162) |
| HSL | hsl(198, 54%, 41%) |
| OKLCH | oklch(56.9% 0.092 229) |
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 #3181A2 | 4.38:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #3181A2 | 4.79:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #3181A2 text on white | 4.38:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #3181A2 text on black | 4.79:1 | AA | Lc -31.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADCE5
oklch(88.4% 0.023 229.1)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C2
oklch(70.7% 0.066 229.5)
-
Step 500
500
#4D93B2
oklch(63% 0.084 229)
-
Step 600
600 (this color)
#3181A2
oklch(56.9% 0.092 229)
-
Step 700
700
#1E6987
oklch(49% 0.085 229.4)
-
Step 800
800
#1C566E
oklch(42.7% 0.071 229.4)
-
Step 900
900
#1E4759
oklch(37.7% 0.055 229.4)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#3181A2 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) | #707FA4 | 0.065 |
| Deuteranopia (no green cones) | #6074A2 | 0.056 |
| Tritanopia (no blue cones) | #008A8C | 0.053 |
| Achromatopsia (no color) | #797979 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3181A2
#3181A2
oklch(56.9% 0.092 229)
- #A36645
#A36645
oklch(57% 0.092 48.6)
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 #3181A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.021
- Teal Blue #01889F ΔE 0.027
- Stormy Blue #507B9C ΔE 0.029
- Blue NCS #118AB2 ΔE 0.031
- Steel Blue #4682B4 ΔE 0.035
- Dull Blue #49759C ΔE 0.036
- Ocean #017B92 ΔE 0.037
- Nice Blue #107AB0 ΔE 0.038
Use #3181A2 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.