#5B7D9F
Closest named color: Stormy Blue (#507B9C). oklch(57.7% 0.065 249), rgb(91, 125, 159).
Aa
Black text reads best on this color (4.87:1).
About this color
#5B7D9F is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.065 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.015 away. Black text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.87:1 |
| White text | 4.30:1 |
Values
| HEX | #5B7D9F |
| RGB | rgb(91, 125, 159) |
| HSL | hsl(210, 27%, 49%) |
| OKLCH | oklch(57.7% 0.065 249) |
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 #5B7D9F | 4.30:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #5B7D9F | 4.87:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #5B7D9F text on white | 4.30:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #5B7D9F text on black | 4.87:1 | AA | Lc -31.9 | Non-text elements, placeholder text |
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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B3C3D3
oklch(81% 0.029 248.2)
-
Step 400
400
#8AA4BD
oklch(70.8% 0.047 247.5)
-
Step 500
500
#6D8DAD
oklch(63.1% 0.06 248.8)
-
Step 600
600 (this color)
#5B7D9F
oklch(57.7% 0.065 249)
-
Step 700
700
#456482
oklch(49.2% 0.061 248.3)
-
Step 800
800
#39516A
oklch(42.6% 0.051 250.1)
-
Step 900
900
#314356
oklch(37.6% 0.04 250.3)
-
Step 950
950
#1D2832
oklch(27.1% 0.024 246.3)
#5B7D9F 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) | #707EA1 | 0.028 |
| Deuteranopia (no green cones) | #67779E | 0.021 |
| Tritanopia (no blue cones) | #418588 | 0.057 |
| Achromatopsia (no color) | #7A7A7A | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B7D9F
#5B7D9F
oklch(57.7% 0.065 249)
- #93734E
#93734E
oklch(57.8% 0.066 70)
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 #5B7D9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.015
- Cerulean #457B9D ΔE 0.026
- Off Blue #5684AE ΔE 0.026
- Grey Blue #647D8E ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.029
- Dull Blue #49759C ΔE 0.033
- Steel Blue #4682B4 ΔE 0.036
- Slate Gray #708090 ΔE 0.038
Use #5B7D9F 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.