#669DA4

Closest named color: Cadet Blue (#5F9EA0). oklch(66% 0.059 206), rgb(102, 157, 164).

Black text reads best on this color (6.92:1).

About this color

#669DA4 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.059 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.011 away. Black text reads best on it, at 6.92:1.

Hue family	Teals and cyans
Lightness	medium-light (66%)
Chroma	muted (0.059)
Temperature	cool
Nearest name	Cadet Blue (#5F9EA0)
Black text	6.92:1
White text	3.03:1

Values

HEX	#669DA4
RGB	rgb(102, 157, 164)
HSL	hsl(187, 25%, 52%)
OKLCH	oklch(66% 0.059 206)

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 #669DA4	3.03:1	AA large text	Lc -62.4	Content text, not long reading
Black text on #669DA4	6.92:1	AA	Lc 47.0	Large or bold text, headings
#669DA4 text on white	3.03:1	AA large text	Lc 57.0	Large or bold text, headings
#669DA4 text on black	6.92:1	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

#F3F6F7

oklch(97.1% 0.003 219.5)
Step 100
100

#E4EBEC

oklch(93.5% 0.008 207.1)
Step 200
200

#CEDCDE

oklch(88.4% 0.015 207.1)
Step 300
300

#ACC6CA

oklch(80.8% 0.029 207.8)
Step 400
400

#7FA9AF

oklch(70.6% 0.046 207.1)
Step 500
500 (this color)

#669DA4

oklch(66% 0.059 206)
Step 600
600

#427E86

oklch(55.6% 0.063 206.8)
Step 700
700

#336A71

oklch(49% 0.059 206.4)
Step 800
800

#2B575C

oklch(42.7% 0.049 205.1)
Step 900
900

#28484C

oklch(37.9% 0.038 205.9)
Step 950
950

#182A2C

oklch(27% 0.024 204.7)

Export this scale for Tailwind in the Tailwind colors tool

#669DA4 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)	#9599A5	0.058
Deuteranopia (no green cones)	#8A91A4	0.053
Tritanopia (no blue cones)	#4DA19F	0.028
Achromatopsia (no color)	#949494	0.059