#39779F
Closest named color: Dull Blue (#49759C). oklch(54.6% 0.089 239.6), rgb(57, 119, 159).
Aa
White text reads best on this color (4.86:1).
About this color
#39779F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.089 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.015 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #39779F |
| RGB | rgb(57, 119, 159) |
| HSL | hsl(204, 47%, 42%) |
| OKLCH | oklch(54.6% 0.089 239.6) |
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 #39779F | 4.86:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #39779F | 4.31:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #39779F text on white | 4.86:1 | AA | Lc 73.5 | Content text, not long reading |
| #39779F text on black | 4.31:1 | AA large text | Lc -28.2 | 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
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#AAC5D8
oklch(80.9% 0.04 238.7)
-
Step 400
400
#7CA7C5
oklch(70.8% 0.064 239.2)
-
Step 500
500
#5890B6
oklch(63% 0.082 239.6)
-
Step 600
600 (this color)
#39779F
oklch(54.6% 0.089 239.6)
-
Step 700
700
#2E678B
oklch(49.2% 0.083 239.3)
-
Step 800
800
#275471
oklch(42.8% 0.069 239.4)
-
Step 900
900
#25455B
oklch(37.6% 0.054 240.3)
-
Step 950
950
#162935
oklch(27.1% 0.033 237.5)
#39779F 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) | #6577A1 | 0.049 |
| Deuteranopia (no green cones) | #576D9E | 0.040 |
| Tritanopia (no blue cones) | #008185 | 0.064 |
| Achromatopsia (no color) | #717171 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39779F
#39779F
oklch(54.6% 0.089 239.6)
- #976337
#976337
oklch(54.6% 0.09 59.5)
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 #39779F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.015
- Muted Blue #3B719F ΔE 0.018
- Cerulean #457B9D ΔE 0.018
- Flat Blue #3C73A8 ΔE 0.021
- Stormy Blue #507B9C ΔE 0.028
- Nice Blue #107AB0 ΔE 0.031
- Metallic Blue #4F738E ΔE 0.031
- Sea Blue #047495 ΔE 0.034
Use #39779F 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.