#00859B
Closest named color: Teal Blue (#01889F). oklch(56.7% 0.1 214.7), rgb(0, 133, 155).
Aa
Black text reads best on this color (4.82:1).
About this color
#00859B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.100 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.010 away. Black text reads best on it, at 4.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.82:1 |
| White text | 4.34:1 |
Values
| HEX | #00859B |
| RGB | rgb(0, 133, 155) |
| HSL | hsl(189, 100%, 30%) |
| OKLCH | oklch(56.7% 0.1 214.7) |
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 #00859B | 4.34:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #00859B | 4.82:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #00859B text on white | 4.34:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #00859B text on black | 4.82:1 | AA | Lc -32.1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C7DEE3
oklch(88.5% 0.025 212.2)
-
Step 300
300
#A0C9D3
oklch(81% 0.046 214.2)
-
Step 400
400
#69ACBD
oklch(70.6% 0.072 215.8)
-
Step 500
500
#3998AC
oklch(63.2% 0.092 214.3)
-
Step 600
600 (this color)
#00859B
oklch(56.7% 0.1 214.7)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#0F4955
oklch(37.5% 0.06 215.1)
-
Step 950
950
#0C2B32
oklch(27% 0.038 215.2)
#00859B 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) | #76809C | 0.090 |
| Deuteranopia (no green cones) | #64749B | 0.080 |
| Tritanopia (no blue cones) | #008D8C | 0.039 |
| Achromatopsia (no color) | #797979 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00859B
#00859B
oklch(56.7% 0.1 214.7)
- #A9604E
#A9604E
oklch(56.8% 0.099 34.8)
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 #00859B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.010
- Ocean #017B92 ΔE 0.030
- Dark Cyan #008B8B ΔE 0.036
- Blue NCS #118AB2 ΔE 0.037
- Teal #008080 ΔE 0.042
- Cerulean #457B9D ΔE 0.043
- Teal Green #0A9396 ΔE 0.046
- Stormy Blue #507B9C ΔE 0.050
Use #00859B 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.