#3F76AE
Closest named color: Flat Blue (#3C73A8). oklch(55.4% 0.105 250.7), rgb(63, 118, 174).
Aa
White text reads best on this color (4.75:1).
About this color
#3F76AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.105 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.012 away. White text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #3F76AE |
| RGB | rgb(63, 118, 174) |
| HSL | hsl(210, 47%, 46%) |
| OKLCH | oklch(55.4% 0.105 250.7) |
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 #3F76AE | 4.75:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #3F76AE | 4.41:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #3F76AE text on white | 4.75:1 | AA | Lc 72.8 | Content text, not long reading |
| #3F76AE text on black | 4.41:1 | AA large text | Lc -28.9 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7DA4CF
oklch(70.6% 0.076 251.4)
-
Step 500
500
#5B8DC2
oklch(63% 0.097 250.9)
-
Step 600
600 (this color)
#3F76AE
oklch(55.4% 0.105 250.7)
-
Step 700
700
#316496
oklch(49.2% 0.098 250)
-
Step 800
800
#2A517A
oklch(42.6% 0.082 251.3)
-
Step 900
900
#264462
oklch(37.8% 0.063 249.8)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#3F76AE 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) | #5E79B0 | 0.036 |
| Deuteranopia (no green cones) | #4F6EAD | 0.026 |
| Tritanopia (no blue cones) | #00838A | 0.084 |
| Achromatopsia (no color) | #737373 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F76AE
#3F76AE
oklch(55.4% 0.105 250.7)
- #996720
#996720
oklch(55.4% 0.105 71.1)
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 #3F76AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.012
- Muted Blue #3B719F ΔE 0.026
- Windows Blue #3778BF ΔE 0.026
- Nice Blue #107AB0 ΔE 0.027
- Dull Blue #49759C ΔE 0.029
- French Blue #436BAD ΔE 0.031
- Cerulean #457B9D ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
Use #3F76AE 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.