#40A9CC
Closest named color: Turquoise Blue (#06B1C4). oklch(68.9% 0.107 223.9), rgb(64, 169, 204).
Aa
Black text reads best on this color (7.76:1).
About this color
#40A9CC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.107 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.033 away. Black text reads best on it, at 7.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.76:1 |
| White text | 2.70:1 |
Values
| HEX | #40A9CC |
| RGB | rgb(64, 169, 204) |
| HSL | hsl(195, 58%, 53%) |
| OKLCH | oklch(68.9% 0.107 223.9) |
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 #40A9CC | 2.70:1 | Fails | Lc -57.3 | Large or bold text, headings |
| Black text on #40A9CC | 7.76:1 | AAA | Lc 51.9 | Large or bold text, headings |
| #40A9CC text on white | 2.70:1 | Fails | Lc 52.1 | Large or bold text, headings |
| #40A9CC text on black | 7.76:1 | AAA | Lc -49.7 | 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
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DDEDF4
oklch(93.6% 0.019 225.7)
-
Step 200
200
#C0DFEC
oklch(88.5% 0.037 225)
-
Step 300
300
#91CBE1
oklch(81% 0.067 223.5)
-
Step 400
400 (this color)
#40A9CC
oklch(68.9% 0.107 223.9)
-
Step 500
500
#0098BE
oklch(63.1% 0.118 223.7)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B39
oklch(26.9% 0.051 225.5)
#40A9CC 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) | #95A5CE | 0.084 |
| Deuteranopia (no green cones) | #8297CC | 0.075 |
| Tritanopia (no blue cones) | #00B4B4 | 0.059 |
| Achromatopsia (no color) | #9D9D9D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40A9CC
#40A9CC
oklch(68.9% 0.107 223.9)
- #D28563
#D28563
oklch(68.9% 0.106 44.4)
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 #40A9CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.033
- Greyblue #77A1B5 ΔE 0.054
- Cadet Blue #5F9EA0 ΔE 0.064
- Light Sea Green #20B2AA ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.068
- Bluey Grey #89A0B0 ΔE 0.074
- Topaz #13BBAF ΔE 0.079
- Faded Blue #658CBB ΔE 0.080
Use #40A9CC 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.