#00858E

Closest named color: Dark Cyan (#008B8B). oklch(56.2% 0.096 203.2), rgb(0, 133, 142).

Black text reads best on this color (4.74:1).

About this color

#00858E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.096 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.021 away. Black text reads best on it, at 4.74:1.

Hue family	Teals and cyans
Lightness	medium-dark (56%)
Chroma	moderately saturated (0.096)
Temperature	cool
Nearest name	Dark Cyan (#008B8B)
Black text	4.74:1
White text	4.42:1

Values

HEX	#00858E
RGB	rgb(0, 133, 142)
HSL	hsl(184, 100%, 28%)
OKLCH	oklch(56.2% 0.096 203.2)

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 #00858E	4.42:1	AA large text	Lc -75.6	Fine for body text
Black text on #00858E	4.74:1	AA	Lc 34.0	Non-text elements, placeholder text
#00858E text on white	4.42:1	AA large text	Lc 70.1	Content text, not long reading
#00858E text on black	4.74:1	AA	Lc -31.6	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 600.

Step 50
50

#F1F7F7

oklch(97.2% 0.006 197.1)
Step 100
100

#E1ECED

oklch(93.5% 0.012 203.5)
Step 200
200

#C8DEE0

oklch(88.5% 0.024 203.4)
Step 300
300

#A1C9CD

oklch(80.8% 0.043 203.9)
Step 400
400

#6AAEB4

oklch(70.8% 0.069 202.9)
Step 500
500

#3A99A1

oklch(63.1% 0.088 203)
Step 600
600 (this color)

#00858E

oklch(56.2% 0.096 203.2)
Step 700
700

#006E76

oklch(49.1% 0.084 203.6)
Step 800
800

#005A61

oklch(42.6% 0.073 204)
Step 900
900

#104A4F

oklch(37.6% 0.057 203.6)
Step 950
950

#0D2C2E

oklch(27.1% 0.036 201.1)

Export this scale for Tailwind in the Tailwind colors tool

#00858E 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)	#797F8F	0.095
Deuteranopia (no green cones)	#69738E	0.088
Tritanopia (no blue cones)	#008B88	0.023
Achromatopsia (no color)	#787878	0.096