#3F72A0
Closest named color: Muted Blue (#3B719F). oklch(53.7% 0.091 247.6), rgb(63, 114, 160).
Aa
White text reads best on this color (5.08:1).
About this color
#3F72A0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.091 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.005 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #3F72A0 |
| RGB | rgb(63, 114, 160) |
| HSL | hsl(208, 43%, 44%) |
| OKLCH | oklch(53.7% 0.091 247.6) |
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 #3F72A0 | 5.08:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #3F72A0 | 4.12:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #3F72A0 text on white | 5.08:1 | AA | Lc 75.0 | Content text, not long reading |
| #3F72A0 text on black | 4.12:1 | AA large text | Lc -26.8 | Dividers and decoration only |
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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ACC4DA
oklch(80.9% 0.041 246)
-
Step 400
400
#80A5C8
oklch(70.7% 0.066 247.3)
-
Step 500
500
#5F8EBA
oklch(63.1% 0.084 247.7)
-
Step 600
600 (this color)
#3F72A0
oklch(53.7% 0.091 247.6)
-
Step 700
700
#36648E
oklch(49% 0.085 247.9)
-
Step 800
800
#2D5273
oklch(42.6% 0.07 247.2)
-
Step 900
900
#29445D
oklch(37.7% 0.054 247.6)
-
Step 950
950
#182837
oklch(27% 0.035 247.7)
#3F72A0 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) | #5E73A2 | 0.036 |
| Deuteranopia (no green cones) | #516A9F | 0.028 |
| Tritanopia (no blue cones) | #007D82 | 0.074 |
| Achromatopsia (no color) | #6E6E6E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F72A0
#3F72A0
oklch(53.7% 0.091 247.6)
- #91632E
#91632E
oklch(53.8% 0.091 67.5)
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 #3F72A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.005
- Flat Blue #3C73A8 ΔE 0.012
- Dull Blue #49759C ΔE 0.016
- Cerulean #457B9D ΔE 0.030
- French Blue #436BAD ΔE 0.032
- Metallic Blue #4F738E ΔE 0.033
- Ocean Blue #03719C ΔE 0.035
- Stormy Blue #507B9C ΔE 0.036
Use #3F72A0 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.