#3F9FA5

Closest named color: Cadet Blue (#5F9EA0). oklch(64.9% 0.089 201), rgb(63, 159, 165).

Black text reads best on this color (6.71:1).

About this color

#3F9FA5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.089 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.026 away. Black text reads best on it, at 6.71:1.

Hue family	Teals and cyans
Lightness	medium-light (65%)
Chroma	moderately saturated (0.089)
Temperature	cool
Nearest name	Cadet Blue (#5F9EA0)
Black text	6.71:1
White text	3.12:1

Values

HEX	#3F9FA5
RGB	rgb(63, 159, 165)
HSL	hsl(184, 45%, 45%)
OKLCH	oklch(64.9% 0.089 201)

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 #3F9FA5	3.12:1	AA large text	Lc -63.5	Content text, not long reading
Black text on #3F9FA5	6.71:1	AA	Lc 46.0	Large or bold text, headings
#3F9FA5 text on white	3.12:1	AA large text	Lc 58.1	Large or bold text, headings
#3F9FA5 text on black	6.71:1	AA	Lc -43.7	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

#F1F7F7

oklch(97.2% 0.006 197.1)
Step 100
100

#E1EDED

oklch(93.7% 0.013 196.9)
Step 200
200

#C8DEE0

oklch(88.5% 0.024 203.4)
Step 300
300

#A0CACC

oklch(81% 0.044 199.9)
Step 400
400

#69AEB2

oklch(70.7% 0.07 200.5)
Step 500
500 (this color)

#3F9FA5

oklch(64.9% 0.089 201)
Step 600
600

#00838A

oklch(55.5% 0.094 201.4)
Step 700
700

#006E74

oklch(49% 0.083 201.4)
Step 800
800

#005B5F

oklch(42.8% 0.073 200)
Step 900
900

#0F4B4E

oklch(37.8% 0.058 200)
Step 950
950

#0C2C2E

oklch(27.1% 0.037 201)

Export this scale for Tailwind in the Tailwind colors tool

#3F9FA5 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)	#9498A6	0.091
Deuteranopia (no green cones)	#848DA6	0.083
Tritanopia (no blue cones)	#00A5A1	0.028
Achromatopsia (no color)	#929292	0.090