#5B779E
Closest named color: Stormy Blue (#507B9C). oklch(56.3% 0.069 256.8), rgb(91, 119, 158).
Aa
White text reads best on this color (4.58:1).
About this color
#5B779E is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.069 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.017 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #5B779E |
| RGB | rgb(91, 119, 158) |
| HSL | hsl(215, 27%, 49%) |
| OKLCH | oklch(56.3% 0.069 256.8) |
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 #5B779E | 4.58:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #5B779E | 4.57:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #5B779E text on white | 4.58:1 | AA | Lc 71.8 | Content text, not long reading |
| #5B779E text on black | 4.57:1 | AA | Lc -29.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B4C2D5
oklch(80.9% 0.031 256)
-
Step 400
400
#8DA2C0
oklch(70.6% 0.05 257.3)
-
Step 500
500
#718BB0
oklch(63.1% 0.064 257.2)
-
Step 600
600 (this color)
#5B779E
oklch(56.3% 0.069 256.8)
-
Step 700
700
#496285
oklch(49.1% 0.064 256.9)
-
Step 800
800
#3C506C
oklch(42.7% 0.053 256.9)
-
Step 900
900
#334258
oklch(37.6% 0.043 257.8)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#5B779E 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) | #6979A0 | 0.020 |
| Deuteranopia (no green cones) | #61729D | 0.015 |
| Tritanopia (no blue cones) | #437F84 | 0.061 |
| Achromatopsia (no color) | #757575 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B779E
#5B779E
oklch(56.3% 0.069 256.8)
- #8D7046
#8D7046
oklch(56.4% 0.069 75.9)
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 #5B779E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.017
- Dull Blue #49759C ΔE 0.023
- Cerulean #457B9D ΔE 0.026
- Metallic Blue #4F738E ΔE 0.031
- Grey Blue #647D8E ΔE 0.037
- Off Blue #5684AE ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.040
- Muted Blue #3B719F ΔE 0.042
Use #5B779E 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.