#3178A2
Closest named color: Muted Blue (#3B719F). oklch(54.7% 0.096 238.2), rgb(49, 120, 162).
Aa
White text reads best on this color (4.83:1).
About this color
#3178A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.096 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.020 away. White text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.33:1 |
| White text | 4.83:1 |
Values
| HEX | #3178A2 |
| RGB | rgb(49, 120, 162) |
| HSL | hsl(202, 54%, 41%) |
| OKLCH | oklch(54.7% 0.096 238.2) |
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 #3178A2 | 4.83:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #3178A2 | 4.33:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #3178A2 text on white | 4.83:1 | AA | Lc 73.3 | Content text, not long reading |
| #3178A2 text on black | 4.33:1 | AA large text | Lc -28.4 | 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
#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
#A8C5DA
oklch(80.9% 0.043 239.6)
-
Step 400
400
#78A7C7
oklch(70.7% 0.069 238.8)
-
Step 500
500
#5291B9
oklch(63.1% 0.089 238.2)
-
Step 600
600 (this color)
#3178A2
oklch(54.7% 0.096 238.2)
-
Step 700
700
#26678D
oklch(49% 0.089 238.3)
-
Step 800
800
#215473
oklch(42.6% 0.075 238.8)
-
Step 900
900
#21465D
oklch(37.8% 0.058 238.2)
-
Step 950
950
#142936
oklch(27% 0.036 237.4)
#3178A2 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) | #6478A4 | 0.053 |
| Deuteranopia (no green cones) | #556DA1 | 0.044 |
| Tritanopia (no blue cones) | #008386 | 0.066 |
| Achromatopsia (no color) | #727272 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3178A2
#3178A2
oklch(54.7% 0.096 238.2)
- #9A6133
#9A6133
oklch(54.6% 0.096 57.7)
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 #3178A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.021
- Dull Blue #49759C ΔE 0.022
- Cerulean #457B9D ΔE 0.022
- Nice Blue #107AB0 ΔE 0.025
- Stormy Blue #507B9C ΔE 0.032
- Sea Blue #047495 ΔE 0.033
- Ocean Blue #03719C ΔE 0.033
Use #3178A2 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.