#01958B
Closest named color: Blue Green (#0F9B8E). oklch(60.3% 0.105 186.5), rgb(1, 149, 139).
Aa
Black text reads best on this color (5.67:1).
About this color
#01958B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.105 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Green (#0F9B8E), ΔE 0.018 away. Black text reads best on it, at 5.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Blue Green (#0F9B8E) |
| Black text | 5.67:1 |
| White text | 3.70:1 |
Values
| HEX | #01958B |
| RGB | rgb(1, 149, 139) |
| HSL | hsl(176, 99%, 29%) |
| OKLCH | oklch(60.3% 0.105 186.5) |
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 #01958B | 3.70:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #01958B | 5.67:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #01958B text on white | 3.70:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #01958B text on black | 5.67:1 | AA | Lc -37.7 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#DFEDEB
oklch(93.5% 0.015 186.7)
-
Step 200
200
#C5E0DC
oklch(88.6% 0.029 185.9)
-
Step 300
300
#9BCCC6
oklch(80.9% 0.052 186.9)
-
Step 400
400
#5EB1A9
oklch(70.6% 0.082 187.4)
-
Step 500
500 (this color)
#01958B
oklch(60.3% 0.105 186.5)
-
Step 600
600
#00857C
oklch(55.5% 0.097 186.5)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#005C55
oklch(42.7% 0.075 185.9)
-
Step 900
900
#004D47
oklch(37.8% 0.066 185.9)
-
Step 950
950
#052D2A
oklch(27% 0.043 187.5)
#01958B 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) | #8C8C8B | 0.111 |
| Deuteranopia (no green cones) | #7C808C | 0.105 |
| Tritanopia (no blue cones) | #009992 | 0.014 |
| Achromatopsia (no color) | #858585 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01958B
#01958B
oklch(60.3% 0.105 186.5)
- #B66577
#B66577
oklch(60.4% 0.106 6.5)
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 #01958B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Green #0F9B8E ΔE 0.018
- Teal Green #0A9396 ΔE 0.020
- Persian Green #2A9D8F ΔE 0.028
- Sea #3C9992 ΔE 0.029
- Dark Cyan #008B8B ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.034
- Ocean Green #3D9973 ΔE 0.045
- Viridian #1E9167 ΔE 0.051
Use #01958B 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.