#313B38

Closest named color: Onyx (#343A40). oklch(34.2% 0.014 175.4), rgb(49, 59, 56).

White text reads best on this color (11.58:1).

About this color

#313B38 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.017 away. White text reads best on it, at 11.58:1.

Hue family	Neutrals
Lightness	dark (34%)
Chroma	close to neutral grey (0.014)
Temperature	neutral
Nearest name	Onyx (#343A40)
Black text	1.81:1
White text	11.58:1

Values

HEX	#313B38
RGB	rgb(49, 59, 56)
HSL	hsl(162, 9%, 21%)
OKLCH	oklch(34.2% 0.014 175.4)

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 #313B38	11.58:1	AAA	Lc -100.3	Preferred for body text
Black text on #313B38	1.81:1	Fails	Lc 0.0	Not readable
#313B38 text on white	11.58:1	AAA	Lc 96.7	Preferred for body text
#313B38 text on black	1.81:1	Fails	Lc 0.0	Not readable

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 900.

Step 50
50

#F4F6F5

oklch(97.1% 0.002 165.1)
Step 100
100

#E8EAEA

oklch(93.6% 0.002 197.1)
Step 200
200

#D5DAD9

oklch(88.4% 0.006 183)
Step 300
300

#BAC3C0

oklch(80.9% 0.011 174.2)
Step 400
400

#96A4A0

oklch(70.6% 0.017 176.9)
Step 500
500

#7C8E89

oklch(63.1% 0.022 177)
Step 600
600

#657872

oklch(55.5% 0.024 174.3)
Step 700
700

#546560

oklch(49.1% 0.022 175.7)
Step 800
800

#45524E

oklch(42.6% 0.018 174.9)
Step 900
900 (this color)

#313B38

oklch(34.2% 0.014 175.4)
Step 950
950

#222826

oklch(27% 0.009 173.5)

Export this scale for Tailwind in the Tailwind colors tool

#313B38 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)	#3A3A38	0.015
Deuteranopia (no green cones)	#383838	0.014
Tritanopia (no blue cones)	#2F3B3A	0.004
Achromatopsia (no color)	#393939	0.015

Harmonies

Hue rotations in OKLCH that keep this color's lightness and chroma.

This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.

Palettes with this color

Curated palettes that contain a color within ΔE 0.04 (OKLab) of #313B38, closest first.

Similar named colors

The eight closest entries in our named color list, with their ΔE distance.

Use #313B38 in your product

Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.

Build a color system from this color Generate a palette