#40878E
Closest named color: Dark Cyan (#008B8B). oklch(58.1% 0.072 204), rgb(64, 135, 142).
Aa
Black text reads best on this color (5.07:1).
About this color
#40878E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.072 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.030 away. Black text reads best on it, at 5.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #40878E |
| RGB | rgb(64, 135, 142) |
| HSL | hsl(185, 38%, 40%) |
| OKLCH | oklch(58.1% 0.072 204) |
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 #40878E | 4.13:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #40878E | 5.07:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #40878E text on white | 4.13:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #40878E text on black | 5.07:1 | AA | Lc -33.4 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#A9C7CA
oklch(80.8% 0.033 203.9)
-
Step 400
400
#7AAAAF
oklch(70.6% 0.052 204.2)
-
Step 500
500
#56959C
oklch(63% 0.066 204.8)
-
Step 600
600 (this color)
#40878E
oklch(58.1% 0.072 204)
-
Step 700
700
#2A6C72
oklch(49.2% 0.067 203.5)
-
Step 800
800
#24585D
oklch(42.8% 0.055 203.9)
-
Step 900
900
#23484C
oklch(37.6% 0.043 204.7)
-
Step 950
950
#152A2D
oklch(26.9% 0.027 207.4)
#40878E 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) | #7E828F | 0.072 |
| Deuteranopia (no green cones) | #71798E | 0.065 |
| Tritanopia (no blue cones) | #008C89 | 0.033 |
| Achromatopsia (no color) | #7D7D7D | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40878E
#40878E
oklch(58.1% 0.072 204)
- #A16A66
#A16A66
oklch(58.2% 0.071 24.1)
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 #40878E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.030
- Teal Blue #01889F ΔE 0.035
- Dusty Teal #4C9085 ΔE 0.037
- Teal Green #0A9396 ΔE 0.038
- Teal #008080 ΔE 0.045
- Grey Blue #647D8E ΔE 0.045
- Cerulean #457B9D ΔE 0.049
- Stormy Blue #507B9C ΔE 0.049
Use #40878E 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.