#3F80AD
Closest named color: Steel Blue (#4682B4). oklch(57.7% 0.096 241.4), rgb(63, 128, 173).
Aa
Black text reads best on this color (4.90:1).
About this color
#3F80AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.014 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #3F80AD |
| RGB | rgb(63, 128, 173) |
| HSL | hsl(205, 47%, 46%) |
| OKLCH | oklch(57.7% 0.096 241.4) |
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 #3F80AD | 4.28:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #3F80AD | 4.90:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #3F80AD text on white | 4.28:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #3F80AD text on black | 4.90:1 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7AA7C8
oklch(70.8% 0.069 240.7)
-
Step 500
500
#5690BA
oklch(63.1% 0.088 241.5)
-
Step 600
600 (this color)
#3F80AD
oklch(57.7% 0.096 241.4)
-
Step 700
700
#2A668F
oklch(49% 0.09 241.8)
-
Step 800
800
#255474
oklch(42.8% 0.074 241.2)
-
Step 900
900
#23455D
oklch(37.6% 0.057 241.3)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#3F80AD 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) | #6C80AF | 0.050 |
| Deuteranopia (no green cones) | #5D75AC | 0.041 |
| Tritanopia (no blue cones) | #008B8F | 0.071 |
| Achromatopsia (no color) | #7A7A7A | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F80AD
#3F80AD
oklch(57.7% 0.096 241.4)
- #A26B39
#A26B39
oklch(57.6% 0.096 61.2)
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 #3F80AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.014
- Cool Blue #4984B8 ΔE 0.022
- Cerulean #457B9D ΔE 0.025
- Off Blue #5684AE ΔE 0.027
- Stormy Blue #507B9C ΔE 0.029
- Blue NCS #118AB2 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.034
- Nice Blue #107AB0 ΔE 0.035
Use #3F80AD 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.