#3A81A8
Closest named color: Cerulean (#457B9D). oklch(57.5% 0.093 235.6), rgb(58, 129, 168).
Aa
Black text reads best on this color (4.88:1).
About this color
#3A81A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.093 and its hue 236°. 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 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #3A81A8 |
| RGB | rgb(58, 129, 168) |
| HSL | hsl(201, 49%, 44%) |
| OKLCH | oklch(57.5% 0.093 235.6) |
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 #3A81A8 | 4.29:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #3A81A8 | 4.88:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #3A81A8 text on white | 4.29:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #3A81A8 text on black | 4.88:1 | AA | Lc -32.2 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A8C5D8
oklch(80.8% 0.041 236.8)
-
Step 400
400
#78A8C5
oklch(70.8% 0.067 235.5)
-
Step 500
500
#5292B6
oklch(63.2% 0.085 235)
-
Step 600
600 (this color)
#3A81A8
oklch(57.5% 0.093 235.6)
-
Step 700
700
#26688B
oklch(49.2% 0.086 235.7)
-
Step 800
800
#215571
oklch(42.8% 0.072 235.6)
-
Step 900
900
#21465B
oklch(37.7% 0.056 235.7)
-
Step 950
950
#142935
oklch(26.9% 0.035 235.2)
#3A81A8 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) | #6E80AA | 0.056 |
| Deuteranopia (no green cones) | #5F75A7 | 0.047 |
| Tritanopia (no blue cones) | #008B8E | 0.063 |
| Achromatopsia (no color) | #7A7A7A | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A81A8
#3A81A8
oklch(57.5% 0.093 235.6)
- #A36940
#A36940
oklch(57.4% 0.093 54.9)
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 #3A81A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.021
- Steel Blue #4682B4 ΔE 0.022
- Stormy Blue #507B9C ΔE 0.027
- Blue NCS #118AB2 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Dull Blue #49759C ΔE 0.035
- Teal Blue #01889F ΔE 0.036
Use #3A81A8 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.