#40978A
Closest named color: Sea (#3C9992). oklch(62% 0.086 182.1), rgb(64, 151, 138).
Aa
Black text reads best on this color (6.01:1).
About this color
#40978A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.086 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.011 away. Black text reads best on it, at 6.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #40978A |
| RGB | rgb(64, 151, 138) |
| HSL | hsl(171, 40%, 42%) |
| OKLCH | oklch(62% 0.086 182.1) |
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 #40978A | 3.49:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #40978A | 6.01:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #40978A text on white | 3.49:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #40978A text on black | 6.01:1 | AA | Lc -39.4 | 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 500.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#C9DEDA
oklch(88.4% 0.023 183.1)
-
Step 300
300
#A4CAC3
oklch(80.9% 0.042 182.8)
-
Step 400
400
#70AFA4
oklch(70.8% 0.067 182.1)
-
Step 500
500 (this color)
#40978A
oklch(62% 0.086 182.1)
-
Step 600
600
#1A8577
oklch(55.6% 0.094 181.5)
-
Step 700
700
#047064
oklch(49% 0.087 182)
-
Step 800
800
#0E5C52
oklch(42.8% 0.072 181.7)
-
Step 900
900
#174B44
oklch(37.6% 0.056 182.8)
-
Step 950
950
#102C28
oklch(27% 0.035 183.1)
#40978A 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) | #918F8A | 0.092 |
| Deuteranopia (no green cones) | #83858B | 0.086 |
| Tritanopia (no blue cones) | #009A93 | 0.024 |
| Achromatopsia (no color) | #898989 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40978A
#40978A
oklch(62% 0.086 182.1)
- #B17082
#B17082
oklch(62% 0.085 1.9)
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 #40978A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.011
- Persian Green #2A9D8F ΔE 0.019
- Dusty Teal #4C9085 ΔE 0.020
- Blue Green #0F9B8E ΔE 0.022
- Grey Teal #5E9B8A ΔE 0.031
- Teal Green #0A9396 ΔE 0.034
- Dull Teal #5F9E8F ΔE 0.037
- Ocean Green #3D9973 ΔE 0.037
Use #40978A 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.