#128BAB
Closest named color: Blue NCS (#118AB2). oklch(59.2% 0.106 222.4), rgb(18, 139, 171).
Aa
Black text reads best on this color (5.30:1).
About this color
#128BAB is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.106 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.012 away. Black text reads best on it, at 5.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #128BAB |
| RGB | rgb(18, 139, 171) |
| HSL | hsl(193, 81%, 37%) |
| OKLCH | oklch(59.2% 0.106 222.4) |
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 #128BAB | 3.95:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #128BAB | 5.30:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #128BAB text on white | 3.95:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #128BAB text on black | 5.30:1 | AA | Lc -35.2 | 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
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DDE6
oklch(88.4% 0.027 224.3)
-
Step 300
300
#A0C8D7
oklch(80.9% 0.047 222.7)
-
Step 400
400
#68ACC3
oklch(70.8% 0.077 221.7)
-
Step 500
500
#3796B4
oklch(63% 0.098 222.7)
-
Step 600
600 (this color)
#128BAB
oklch(59.2% 0.106 222.4)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#0E495A
oklch(37.8% 0.064 222.2)
-
Step 950
950
#0C2B35
oklch(27.1% 0.04 222.7)
#128BAB 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) | #7887AD | 0.084 |
| Deuteranopia (no green cones) | #667AAB | 0.075 |
| Tritanopia (no blue cones) | #009595 | 0.052 |
| Achromatopsia (no color) | #808080 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128BAB
#128BAB
oklch(59.2% 0.106 222.4)
- #B26749
#B26749
oklch(59.2% 0.106 42.2)
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 #128BAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.012
- Teal Blue #01889F ΔE 0.020
- Steel Blue #4682B4 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.045
- Teal Green #0A9396 ΔE 0.046
- Off Blue #5684AE ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.049
- Cerulean #457B9D ΔE 0.049
Use #128BAB 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.