#006371
Closest named color: Petrol (#005F6A). oklch(45.8% 0.08 211.5), rgb(0, 99, 113).
Aa
White text reads best on this color (6.94:1).
About this color
#006371 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.080 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.015 away. White text reads best on it, at 6.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #006371 |
| RGB | rgb(0, 99, 113) |
| HSL | hsl(187, 100%, 22%) |
| OKLCH | oklch(45.8% 0.08 211.5) |
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 #006371 | 6.94:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #006371 | 3.02:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #006371 text on white | 6.94:1 | AA | Lc 83.5 | Fine for body text |
| #006371 text on black | 3.02:1 | AA large text | Lc -18.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECEF
oklch(93.5% 0.013 214.4)
-
Step 200
200
#C7DEE3
oklch(88.5% 0.025 212.2)
-
Step 300
300
#9FC9D2
oklch(80.9% 0.046 212.2)
-
Step 400
400
#66ADBB
oklch(70.6% 0.074 211.6)
-
Step 500
500
#3199AA
oklch(63.2% 0.095 210.7)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800 (this color)
#006371
oklch(45.8% 0.08 211.5)
-
Step 900
900
#094A54
oklch(37.7% 0.062 211)
-
Step 950
950
#0A2B31
oklch(26.8% 0.039 211.9)
#006371 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) | #585F72 | 0.074 |
| Deuteranopia (no green cones) | #4B5571 | 0.068 |
| Tritanopia (no blue cones) | #006967 | 0.029 |
| Achromatopsia (no color) | #5A5A5A | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #006371
#006371
oklch(45.8% 0.08 211.5)
- #7E463B
#7E463B
oklch(45.9% 0.08 32.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #006371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.015
- Dark Aqua #05696B ΔE 0.025
- Dark Green Blue #1F6357 ΔE 0.043
- Deep Turquoise #017374 ΔE 0.051
- Deep Teal #00555A ΔE 0.052
- Dark Aquamarine #017371 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.053
- Peacock Blue #016795 ΔE 0.059
Use #006371 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.