#0591BD
Closest named color: Blue NCS (#118AB2). oklch(61.4% 0.12 228.7), rgb(5, 145, 189).
Aa
Black text reads best on this color (5.79:1).
About this color
#0591BD is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.023 away. Black text reads best on it, at 5.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #0591BD |
| RGB | rgb(5, 145, 189) |
| HSL | hsl(194, 95%, 38%) |
| OKLCH | oklch(61.4% 0.12 228.7) |
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 #0591BD | 3.62:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #0591BD | 5.79:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #0591BD text on white | 3.62:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #0591BD text on black | 5.79:1 | AA | Lc -38.4 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C4DEEA
oklch(88.5% 0.032 227.3)
-
Step 300
300
#9AC9DF
oklch(81% 0.058 228.3)
-
Step 400
400
#5CACCF
oklch(70.7% 0.094 228.7)
-
Step 500
500 (this color)
#0591BD
oklch(61.4% 0.12 228.7)
-
Step 600
600
#007FA6
oklch(55.7% 0.109 228.5)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#042B39
oklch(27.1% 0.049 227.2)
#0591BD 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) | #7A8FBF | 0.084 |
| Deuteranopia (no green cones) | #6480BC | 0.071 |
| Tritanopia (no blue cones) | #009DA0 | 0.065 |
| Achromatopsia (no color) | #868686 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0591BD
#0591BD
oklch(61.4% 0.12 228.7)
- #BD6C3E
#BD6C3E
oklch(61.3% 0.12 48.8)
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 #0591BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.023
- Water Blue #0E87CC ΔE 0.041
- Cool Blue #4984B8 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.046
- Teal Blue #01889F ΔE 0.049
- Off Blue #5684AE ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.053
- Faded Blue #658CBB ΔE 0.059
Use #0591BD 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.