#40858B
Closest named color: Dark Cyan (#008B8B). oklch(57.5% 0.07 203), rgb(64, 133, 139).
Aa
Black text reads best on this color (4.94:1).
About this color
#40858B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.070 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.031 away. Black text reads best on it, at 4.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #40858B |
| RGB | rgb(64, 133, 139) |
| HSL | hsl(185, 37%, 40%) |
| OKLCH | oklch(57.5% 0.07 203) |
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 #40858B | 4.24:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #40858B | 4.94:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #40858B text on white | 4.24:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #40858B text on black | 4.94:1 | AA | Lc -32.5 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#AAC7CA
oklch(80.9% 0.032 204.2)
-
Step 400
400
#7BAAAE
oklch(70.6% 0.05 202.7)
-
Step 500
500
#57959B
oklch(63% 0.065 203.6)
-
Step 600
600 (this color)
#40858B
oklch(57.5% 0.07 203)
-
Step 700
700
#2C6C71
oklch(49.2% 0.065 202.3)
-
Step 800
800
#26585C
oklch(42.8% 0.054 202.4)
-
Step 900
900
#24484B
oklch(37.6% 0.042 202.6)
-
Step 950
950
#162A2C
oklch(26.9% 0.026 203.9)
#40858B 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) | #7C808B | 0.070 |
| Deuteranopia (no green cones) | #70778B | 0.065 |
| Tritanopia (no blue cones) | #018A87 | 0.032 |
| Achromatopsia (no color) | #7B7B7B | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40858B
#40858B
oklch(57.5% 0.07 203)
- #9E6865
#9E6865
oklch(57.4% 0.07 23)
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 #40858B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.031
- Teal Blue #01889F ΔE 0.037
- Dusty Teal #4C9085 ΔE 0.040
- Teal #008080 ΔE 0.040
- Teal Green #0A9396 ΔE 0.042
- Grey Blue #647D8E ΔE 0.044
- Cerulean #457B9D ΔE 0.048
- Stormy Blue #507B9C ΔE 0.048
Use #40858B 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.