#00637F
Closest named color: Petrol (#005F6A). oklch(46.5% 0.089 225.7), rgb(0, 99, 127).
Aa
White text reads best on this color (6.79:1).
About this color
#00637F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.089 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.035 away. White text reads best on it, at 6.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.09:1 |
| White text | 6.79:1 |
Values
| HEX | #00637F |
| RGB | rgb(0, 99, 127) |
| HSL | hsl(193, 100%, 25%) |
| OKLCH | oklch(46.5% 0.089 225.7) |
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 #00637F | 6.79:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #00637F | 3.09:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #00637F text on white | 6.79:1 | AA | Lc 82.9 | Fine for body text |
| #00637F text on black | 3.09:1 | AA large text | Lc -19.0 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A4C7D6
oklch(80.9% 0.043 225.7)
-
Step 400
400
#71AAC1
oklch(70.7% 0.068 225.3)
-
Step 500
500
#4794B2
oklch(63% 0.088 226.3)
-
Step 600
600
#227E9E
oklch(55.5% 0.096 226.4)
-
Step 700
700 (this color)
#00637F
oklch(46.5% 0.089 225.7)
-
Step 800
800
#14576D
oklch(42.7% 0.073 225.1)
-
Step 900
900
#1A4859
oklch(37.8% 0.057 225.8)
-
Step 950
950
#112A34
oklch(27% 0.036 226.6)
#00637F 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) | #546180 | 0.067 |
| Deuteranopia (no green cones) | #45567F | 0.059 |
| Tritanopia (no blue cones) | #006B6C | 0.046 |
| Achromatopsia (no color) | #5B5B5B | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00637F
#00637F
oklch(46.5% 0.089 225.7)
- #82482C
#82482C
oklch(46.6% 0.089 45.6)
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 #00637F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.035
- Peacock Blue #016795 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.040
- Dark Aqua #05696B ΔE 0.043
- Denim #3B638C ΔE 0.044
- YInMn Blue #415A77 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.049
- Ocean Blue #03719C ΔE 0.057
Use #00637F 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.