#00637B
Closest named color: Petrol (#005F6A). oklch(46.3% 0.086 222), rgb(0, 99, 123).
Aa
White text reads best on this color (6.83:1).
About this color
#00637B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.086 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.028 away. White text reads best on it, at 6.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.07:1 |
| White text | 6.83:1 |
Values
| HEX | #00637B |
| RGB | rgb(0, 99, 123) |
| HSL | hsl(192, 100%, 24%) |
| OKLCH | oklch(46.3% 0.086 222) |
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 #00637B | 6.83:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #00637B | 3.07:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #00637B text on white | 6.83:1 | AA | Lc 83.1 | Fine for body text |
| #00637B text on black | 3.07:1 | AA large text | Lc -18.9 | 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
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A4C7D4
oklch(80.8% 0.042 222.4)
-
Step 400
400
#71AABE
oklch(70.6% 0.066 222.1)
-
Step 500
500
#4895AE
oklch(63.1% 0.084 221.9)
-
Step 600
600
#237F9A
oklch(55.6% 0.092 222.2)
-
Step 700
700 (this color)
#00637B
oklch(46.3% 0.086 222)
-
Step 800
800
#15576B
oklch(42.6% 0.071 223)
-
Step 900
900
#1A4857
oklch(37.7% 0.056 222.8)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#00637B 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) | #55607C | 0.069 |
| Deuteranopia (no green cones) | #47567B | 0.061 |
| Tritanopia (no blue cones) | #006A6B | 0.040 |
| Achromatopsia (no color) | #5B5B5B | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00637B
#00637B
oklch(46.3% 0.086 222)
- #814731
#814731
oklch(46.3% 0.086 41.2)
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 #00637B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.028
- Dark Aqua #05696B ΔE 0.037
- Peacock Blue #016795 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.047
- Denim #3B638C ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.051
- Deep Turquoise #017374 ΔE 0.056
Use #00637B 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.