#31779D
Closest named color: Muted Blue (#3B719F). oklch(54.2% 0.091 235.8), rgb(49, 119, 157).
Aa
White text reads best on this color (4.93:1).
About this color
#31779D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.091 and its hue 236°. 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 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #31779D |
| RGB | rgb(49, 119, 157) |
| HSL | hsl(201, 52%, 40%) |
| OKLCH | oklch(54.2% 0.091 235.8) |
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 #31779D | 4.93:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #31779D | 4.25:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #31779D text on white | 4.93:1 | AA | Lc 73.9 | Content text, not long reading |
| #31779D text on black | 4.25:1 | AA large text | Lc -27.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C5D8
oklch(80.8% 0.041 236.8)
-
Step 400
400
#78A8C4
oklch(70.8% 0.066 234.5)
-
Step 500
500
#5491B6
oklch(63% 0.084 236.8)
-
Step 600
600 (this color)
#31779D
oklch(54.2% 0.091 235.8)
-
Step 700
700
#27688A
oklch(49.2% 0.085 235.2)
-
Step 800
800
#225570
oklch(42.8% 0.07 234.9)
-
Step 900
900
#22465B
oklch(37.7% 0.055 236.3)
-
Step 950
950
#152935
oklch(27% 0.034 236.3)
#31779D 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) | #65769F | 0.055 |
| Deuteranopia (no green cones) | #566C9C | 0.045 |
| Tritanopia (no blue cones) | #008184 | 0.061 |
| Achromatopsia (no color) | #707070 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31779D
#31779D
oklch(54.2% 0.091 235.8)
- #986037
#986037
oklch(54.2% 0.092 55.5)
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 #31779D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.020
- Dull Blue #49759C ΔE 0.021
- Cerulean #457B9D ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.025
- Sea Blue #047495 ΔE 0.027
- Ocean Blue #03719C ΔE 0.030
- Nice Blue #107AB0 ΔE 0.031
- Ocean #017B92 ΔE 0.031
Use #31779D 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.