#3A87B2
Closest named color: Steel Blue (#4682B4). oklch(59.4% 0.1 236.4), rgb(58, 135, 178).
Aa
Black text reads best on this color (5.28:1).
About this color
#3A87B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.100 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.017 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #3A87B2 |
| RGB | rgb(58, 135, 178) |
| HSL | hsl(202, 51%, 46%) |
| OKLCH | oklch(59.4% 0.1 236.4) |
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 #3A87B2 | 3.97:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #3A87B2 | 5.28:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #3A87B2 text on white | 3.97:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #3A87B2 text on black | 5.28:1 | AA | Lc -34.9 | 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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DC
oklch(80.8% 0.049 235.8)
-
Step 400
400
#70A8CB
oklch(70.6% 0.078 236.8)
-
Step 500
500 (this color)
#3A87B2
oklch(59.4% 0.1 236.4)
-
Step 600
600
#217CAA
oklch(55.6% 0.108 236.3)
-
Step 700
700
#106892
oklch(49% 0.101 236.5)
-
Step 800
800
#135576
oklch(42.6% 0.083 236.1)
-
Step 900
900
#194660
oklch(37.6% 0.066 237.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#3A87B2 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) | #7386B4 | 0.060 |
| Deuteranopia (no green cones) | #627AB1 | 0.050 |
| Tritanopia (no blue cones) | #009296 | 0.066 |
| Achromatopsia (no color) | #808080 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A87B2
#3A87B2
oklch(59.4% 0.1 236.4)
- #AB6E40
#AB6E40
oklch(59.4% 0.099 56.4)
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 #3A87B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.017
- Cool Blue #4984B8 ΔE 0.019
- Blue NCS #118AB2 ΔE 0.020
- Off Blue #5684AE ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.029
- Cerulean #457B9D ΔE 0.041
- Teal Blue #01889F ΔE 0.041
- Stormy Blue #507B9C ΔE 0.043
Use #3A87B2 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.