#40ABB3
Closest named color: Turquoise Blue (#06B1C4). oklch(68.4% 0.097 202.2), rgb(64, 171, 179).
Aa
Black text reads best on this color (7.69:1).
About this color
#40ABB3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.097 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.028 away. Black text reads best on it, at 7.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.69:1 |
| White text | 2.72:1 |
Values
| HEX | #40ABB3 |
| RGB | rgb(64, 171, 179) |
| HSL | hsl(184, 47%, 48%) |
| OKLCH | oklch(68.4% 0.097 202.2) |
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 #40ABB3 | 2.72:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #40ABB3 | 7.69:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #40ABB3 text on white | 2.72:1 | Fails | Lc 52.5 | Large or bold text, headings |
| #40ABB3 text on black | 7.69:1 | AAA | Lc -49.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DDEEEF
oklch(93.7% 0.018 201.1)
-
Step 200
200
#C1E0E3
oklch(88.5% 0.033 203.7)
-
Step 300
300
#92CDD1
oklch(80.9% 0.061 201.3)
-
Step 400
400 (this color)
#40ABB3
oklch(68.4% 0.097 202.2)
-
Step 500
500
#009CA5
oklch(63.1% 0.107 202)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#40ABB3 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) | #9EA4B4 | 0.097 |
| Deuteranopia (no green cones) | #8D97B4 | 0.090 |
| Tritanopia (no blue cones) | #00B1AD | 0.029 |
| Achromatopsia (no color) | #9C9C9C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40ABB3
#40ABB3
oklch(68.4% 0.097 202.2)
- #CE817E
#CE817E
oklch(68.3% 0.096 22.3)
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 #40ABB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.028
- Light Sea Green #20B2AA ΔE 0.031
- Cadet Blue #5F9EA0 ΔE 0.041
- Topaz #13BBAF ΔE 0.050
- Greyblue #77A1B5 ΔE 0.054
- Dull Teal #5F9E8F ΔE 0.055
- Greeny Blue #42B395 ΔE 0.057
- Sea #3C9992 ΔE 0.062
Use #40ABB3 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.