#579FA5

Closest named color: Cadet Blue (#5F9EA0). oklch(65.8% 0.073 202.6), rgb(87, 159, 165).

Black text reads best on this color (6.90:1).

About this color

#579FA5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.073 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.009 away. Black text reads best on it, at 6.90:1.

Hue family	Teals and cyans
Lightness	medium-light (66%)
Chroma	moderately saturated (0.073)
Temperature	cool
Nearest name	Cadet Blue (#5F9EA0)
Black text	6.90:1
White text	3.04:1

Values

HEX	#579FA5
RGB	rgb(87, 159, 165)
HSL	hsl(185, 31%, 49%)
OKLCH	oklch(65.8% 0.073 202.6)

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 #579FA5	3.04:1	AA large text	Lc -62.4	Content text, not long reading
Black text on #579FA5	6.90:1	AA	Lc 47.0	Large or bold text, headings
#579FA5 text on white	3.04:1	AA large text	Lc 57.1	Large or bold text, headings
#579FA5 text on black	6.90:1	AA	Lc -44.7	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

#E2ECED

oklch(93.6% 0.011 204.1)
Step 200
200

#CBDDDF

oklch(88.5% 0.019 204.8)
Step 300
300

#A7C8CB

oklch(81% 0.036 203.2)
Step 400
400

#76ACB0

oklch(70.8% 0.057 201.8)
Step 500
500 (this color)

#579FA5

oklch(65.8% 0.073 202.6)
Step 600
600

#2D8187

oklch(55.6% 0.079 201.9)
Step 700
700

#1F6D73

oklch(49.2% 0.073 202.6)
Step 800
800

#1C595D

oklch(42.7% 0.061 201.3)
Step 900
900

#1E494D

oklch(37.7% 0.048 203.6)
Step 950
950

#132B2D

oklch(27.1% 0.03 202.6)

Export this scale for Tailwind in the Tailwind colors tool

#579FA5 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)	#959AA5	0.072
Deuteranopia (no green cones)	#8890A5	0.067
Tritanopia (no blue cones)	#2DA4A1	0.032
Achromatopsia (no color)	#949494	0.073