#3A809D
Closest named color: Cerulean (#457B9D). oklch(56.7% 0.083 228.1), rgb(58, 128, 157).
Aa
Black text reads best on this color (4.75:1).
About this color
#3A809D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.083 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.016 away. Black text reads best on it, at 4.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #3A809D |
| RGB | rgb(58, 128, 157) |
| HSL | hsl(198, 46%, 42%) |
| OKLCH | oklch(56.7% 0.083 228.1) |
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 #3A809D | 4.41:1 | AA large text | Lc -75.9 | Fine for body text |
| Black text on #3A809D | 4.75:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #3A809D text on white | 4.41:1 | AA large text | Lc 70.4 | Content text, not long reading |
| #3A809D text on black | 4.75:1 | AA | Lc -31.2 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D4
oklch(81% 0.037 228.5)
-
Step 400
400
#79A8BE
oklch(70.6% 0.06 228.6)
-
Step 500
500
#5493AE
oklch(63.2% 0.077 227.7)
-
Step 600
600 (this color)
#3A809D
oklch(56.7% 0.083 228.1)
-
Step 700
700
#286983
oklch(49.1% 0.077 228)
-
Step 800
800
#23566A
oklch(42.8% 0.063 226.9)
-
Step 900
900
#224756
oklch(37.7% 0.049 226.8)
-
Step 950
950
#152A33
oklch(27.2% 0.032 227.5)
#3A809D 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) | #717E9E | 0.061 |
| Deuteranopia (no green cones) | #63739D | 0.054 |
| Tritanopia (no blue cones) | #008889 | 0.052 |
| Achromatopsia (no color) | #787878 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A809D
#3A809D
oklch(56.7% 0.083 228.1)
- #9F674A
#9F674A
oklch(56.7% 0.084 47.9)
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 #3A809D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.016
- Stormy Blue #507B9C ΔE 0.023
- Teal Blue #01889F ΔE 0.030
- Dull Blue #49759C ΔE 0.033
- Ocean #017B92 ΔE 0.037
- Blue NCS #118AB2 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.040
Use #3A809D 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.