#01637D
Closest named color: Petrol (#005F6A). oklch(46.4% 0.087 223.9), rgb(1, 99, 125).
Aa
White text reads best on this color (6.81:1).
About this color
#01637D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.087 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.031 away. White text reads best on it, at 6.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #01637D |
| RGB | rgb(1, 99, 125) |
| HSL | hsl(193, 98%, 25%) |
| OKLCH | oklch(46.4% 0.087 223.9) |
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 #01637D | 6.81:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #01637D | 3.08:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #01637D text on white | 6.81:1 | AA | Lc 83.0 | Fine for body text |
| #01637D text on black | 3.08:1 | 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
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A4C7D5
oklch(80.9% 0.042 224.1)
-
Step 400
400
#71AAC0
oklch(70.7% 0.068 224.3)
-
Step 500
500
#4895B0
oklch(63.2% 0.086 223.7)
-
Step 600
600
#237F9C
oklch(55.7% 0.093 223.9)
-
Step 700
700 (this color)
#01637D
oklch(46.4% 0.087 223.9)
-
Step 800
800
#15576C
oklch(42.7% 0.072 224.1)
-
Step 900
900
#1A4858
oklch(37.8% 0.056 224.3)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#01637D 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) | #54617E | 0.067 |
| Deuteranopia (no green cones) | #46567D | 0.060 |
| Tritanopia (no blue cones) | #006B6C | 0.043 |
| Achromatopsia (no color) | #5B5B5B | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01637D
#01637D
oklch(46.4% 0.087 223.9)
- #81482F
#81482F
oklch(46.5% 0.087 43.9)
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 #01637D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.031
- Peacock Blue #016795 ΔE 0.039
- Dark Aqua #05696B ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim #3B638C ΔE 0.046
- YInMn Blue #415A77 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.050
- Deep Turquoise #017374 ΔE 0.057
Use #01637D 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.