#558F9F
Closest named color: Blue Grey (#758DA3). oklch(61.6% 0.065 217.4), rgb(85, 143, 159).
Aa
Black text reads best on this color (5.81:1).
About this color
#558F9F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.065 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.038 away. Black text reads best on it, at 5.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.81:1 |
| White text | 3.61:1 |
Values
| HEX | #558F9F |
| RGB | rgb(85, 143, 159) |
| HSL | hsl(193, 30%, 48%) |
| OKLCH | oklch(61.6% 0.065 217.4) |
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 #558F9F | 3.61:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #558F9F | 5.81:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #558F9F text on white | 3.61:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #558F9F text on black | 5.81:1 | AA | Lc -38.1 | 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 500.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ABC6CE
oklch(80.9% 0.031 217.5)
-
Step 400
400
#7DA9B6
oklch(70.8% 0.051 218)
-
Step 500
500 (this color)
#558F9F
oklch(61.6% 0.065 217.4)
-
Step 600
600
#3D7E8F
oklch(55.7% 0.071 217.2)
-
Step 700
700
#2E6A79
oklch(49.1% 0.066 216.7)
-
Step 800
800
#285663
oklch(42.6% 0.055 218.7)
-
Step 900
900
#254750
oklch(37.6% 0.042 216.9)
-
Step 950
950
#162A2F
oklch(27% 0.027 215.5)
#558F9F 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) | #848CA0 | 0.057 |
| Deuteranopia (no green cones) | #79839F | 0.052 |
| Tritanopia (no blue cones) | #319594 | 0.040 |
| Achromatopsia (no color) | #878787 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558F9F
#558F9F
oklch(61.6% 0.065 217.4)
- #A87869
#A87869
oklch(61.7% 0.065 38.1)
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 #558F9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.039
- Steel #738595 ΔE 0.041
- Light Slate Gray #778899 ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.044
- Off Blue #5684AE ΔE 0.045
- Sea #3C9992 ΔE 0.045
Use #558F9F 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.