#01809F
Closest named color: Ocean (#017B92). oklch(55.7% 0.103 222.7), rgb(1, 128, 159).
Aa
Black text reads best on this color (4.58:1).
About this color
#01809F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.103 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.023 away. Black text reads best on it, at 4.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #01809F |
| RGB | rgb(1, 128, 159) |
| HSL | hsl(192, 99%, 31%) |
| OKLCH | oklch(55.7% 0.103 222.7) |
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 #01809F | 4.57:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #01809F | 4.58:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #01809F text on white | 4.57:1 | AA | Lc 71.2 | Content text, not long reading |
| #01809F text on black | 4.58:1 | AA | Lc -30.5 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A1C8D7
oklch(81% 0.046 223.3)
-
Step 400
400
#6AABC2
oklch(70.6% 0.074 222.6)
-
Step 500
500
#3B96B3
oklch(63.1% 0.095 222.6)
-
Step 600
600 (this color)
#01809F
oklch(55.7% 0.103 222.7)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#114959
oklch(37.8% 0.062 221.4)
-
Step 950
950
#0D2B34
oklch(27.1% 0.039 220.8)
#01809F 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) | #6E7DA1 | 0.082 |
| Deuteranopia (no green cones) | #5C709F | 0.072 |
| Tritanopia (no blue cones) | #00898A | 0.049 |
| Achromatopsia (no color) | #757575 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01809F
#01809F
oklch(55.7% 0.103 222.7)
- #A55E40
#A55E40
oklch(55.7% 0.103 43.2)
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 #01809F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.023
- Teal Blue #01889F ΔE 0.024
- Cerulean #457B9D ΔE 0.035
- Sea Blue #047495 ΔE 0.036
- Nice Blue #107AB0 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.038
- Ocean Blue #03719C ΔE 0.045
- Stormy Blue #507B9C ΔE 0.045
Use #01809F 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.