#309D89

Closest named color: Persian Green (#2A9D8F). oklch(63% 0.102 177.9), rgb(48, 157, 137).

Black text reads best on this color (6.30:1).

About this color

#309D89 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.102 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Persian Green (#2A9D8F), ΔE 0.009 away. Black text reads best on it, at 6.30:1.

Hue family	Teals and cyans
Lightness	medium-light (63%)
Chroma	moderately saturated (0.102)
Temperature	cool
Nearest name	Persian Green (#2A9D8F)
Black text	6.30:1
White text	3.32:1

Values

HEX	#309D89
RGB	rgb(48, 157, 137)
HSL	hsl(169, 53%, 40%)
OKLCH	oklch(63% 0.102 177.9)

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 #309D89	3.32:1	AA large text	Lc -65.8	Content text, not long reading
Black text on #309D89	6.30:1	AA	Lc 43.7	Non-text elements, placeholder text
#309D89 text on white	3.32:1	AA large text	Lc 60.4	Content text, not long reading
#309D89 text on black	6.30:1	AA	Lc -41.4	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

#F1F7F5

oklch(97.1% 0.007 174.4)
Step 100
100

#E0EDEA

oklch(93.6% 0.014 180.7)
Step 200
200

#C7DFD9

oklch(88.4% 0.027 179)
Step 300
300

#9FCCC0

oklch(81% 0.05 176.9)
Step 400
400

#66B1A0

oklch(70.7% 0.08 177.6)
Step 500
500 (this color)

#309D89

oklch(63% 0.102 177.9)
Step 600
600

#008673

oklch(55.5% 0.102 178.1)
Step 700
700

#007161

oklch(49.1% 0.09 178.4)
Step 800
800

#005D4F

oklch(42.8% 0.079 177.8)
Step 900
900

#084D41

oklch(37.7% 0.067 177.1)
Step 950
950

#0A2D26

oklch(27% 0.042 177.2)

Export this scale for Tailwind in the Tailwind colors tool

#309D89 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)	#979388	0.108
Deuteranopia (no green cones)	#87888B	0.102
Tritanopia (no blue cones)	#009F97	0.021
Achromatopsia (no color)	#8D8D8D	0.102