#5B758A
Closest named color: Metallic Blue (#4F738E). oklch(55% 0.045 243), rgb(91, 117, 138).
Aa
White text reads best on this color (4.82:1).
About this color
#5B758A is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.045 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.018 away. White text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.35:1 |
| White text | 4.82:1 |
Values
| HEX | #5B758A |
| RGB | rgb(91, 117, 138) |
| HSL | hsl(207, 21%, 45%) |
| OKLCH | oklch(55% 0.045 243) |
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 #5B758A | 4.82:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #5B758A | 4.35:1 | AA large text | Lc 30.7 | Non-text elements, placeholder text |
| #5B758A text on white | 4.82:1 | AA | Lc 73.4 | Content text, not long reading |
| #5B758A text on black | 4.35:1 | AA large text | Lc -28.3 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B6C2CD
oklch(80.8% 0.02 245.7)
-
Step 400
400
#90A3B4
oklch(70.6% 0.033 245.3)
-
Step 500
500
#748DA1
oklch(63.1% 0.042 242.5)
-
Step 600
600 (this color)
#5B758A
oklch(55% 0.045 243)
-
Step 700
700
#4C6477
oklch(49.1% 0.042 242.5)
-
Step 800
800
#3F5161
oklch(42.6% 0.035 245.6)
-
Step 900
900
#35434F
oklch(37.5% 0.027 244.5)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#5B758A 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) | #6C758B | 0.023 |
| Deuteranopia (no green cones) | #66708A | 0.020 |
| Tritanopia (no blue cones) | #4C7A7C | 0.036 |
| Achromatopsia (no color) | #727272 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B758A
#5B758A
oklch(55% 0.045 243)
- #856C57
#856C57
oklch(55% 0.045 61.7)
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 #5B758A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.018
- Grey Blue #647D8E ΔE 0.027
- Battleship Gray #6C757D ΔE 0.029
- Stormy Blue #507B9C ΔE 0.029
- Battleship Grey #6B7C85 ΔE 0.034
- Dull Blue #49759C ΔE 0.034
- Cerulean #457B9D ΔE 0.035
- Slate Gray #708090 ΔE 0.045
Use #5B758A 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.