#01957B
Closest named color: Viridian (#1E9167). oklch(59.8% 0.113 174.5), rgb(1, 149, 123).
Aa
Black text reads best on this color (5.58:1).
About this color
#01957B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.113 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.027 away. Black text reads best on it, at 5.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.58:1 |
| White text | 3.75:1 |
Values
| HEX | #01957B |
| RGB | rgb(1, 149, 123) |
| HSL | hsl(169, 99%, 29%) |
| OKLCH | oklch(59.8% 0.113 174.5) |
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 #01957B | 3.75:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #01957B | 5.58:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #01957B text on white | 3.75:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #01957B text on black | 5.58:1 | AA | Lc -37.1 | 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 500.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E0EEE9
oklch(93.7% 0.016 172.6)
-
Step 200
200
#C5E0D8
oklch(88.5% 0.031 175.8)
-
Step 300
300
#9CCDBE
oklch(81% 0.055 174.1)
-
Step 400
400
#5FB39D
oklch(70.7% 0.089 174.6)
-
Step 500
500 (this color)
#01957B
oklch(59.8% 0.113 174.5)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#052E25
oklch(27.1% 0.047 174.4)
#01957B 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) | #8F8A7A | 0.118 |
| Deuteranopia (no green cones) | #7F7F7D | 0.112 |
| Tritanopia (no blue cones) | #00978D | 0.026 |
| Achromatopsia (no color) | #848484 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01957B
#01957B
oklch(59.8% 0.113 174.5)
- #B36184
#B36184
oklch(59.8% 0.113 354.1)
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 #01957B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.027
- Ocean Green #3D9973 ΔE 0.030
- Blue Green #0F9B8E ΔE 0.030
- Persian Green #2A9D8F ΔE 0.038
- Dusty Teal #4C9085 ΔE 0.044
- Teal Green #0A9396 ΔE 0.044
- Sea #3C9992 ΔE 0.045
- Dark Cyan #008B8B ΔE 0.045
Use #01957B 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.