#407E8A
Closest named color: Cerulean (#457B9D). oklch(55.7% 0.066 211.7), rgb(64, 126, 138).
Aa
White text reads best on this color (4.59:1).
About this color
#407E8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.066 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.035 away. White text reads best on it, at 4.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.56:1 |
| White text | 4.59:1 |
Values
| HEX | #407E8A |
| RGB | rgb(64, 126, 138) |
| HSL | hsl(190, 37%, 40%) |
| OKLCH | oklch(55.7% 0.066 211.7) |
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 #407E8A | 4.59:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #407E8A | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #407E8A text on white | 4.59:1 | AA | Lc 71.8 | Content text, not long reading |
| #407E8A text on black | 4.56:1 | AA | Lc -29.9 | Dividers and decoration only |
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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ACC6CC
oklch(80.9% 0.029 213.2)
-
Step 400
400
#7EA9B2
oklch(70.7% 0.048 212)
-
Step 500
500
#5C949F
oklch(63.2% 0.061 211.4)
-
Step 600
600 (this color)
#407E8A
oklch(55.7% 0.066 211.7)
-
Step 700
700
#316A75
oklch(49.1% 0.062 211.9)
-
Step 800
800
#2A575F
oklch(42.8% 0.051 210.5)
-
Step 900
900
#27474E
oklch(37.6% 0.04 213.3)
-
Step 950
950
#172A2E
oklch(27.1% 0.026 212.5)
#407E8A 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) | #747A8B | 0.062 |
| Deuteranopia (no green cones) | #69728A | 0.056 |
| Tritanopia (no blue cones) | #0A8382 | 0.036 |
| Achromatopsia (no color) | #757575 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #407E8A
#407E8A
oklch(55.7% 0.066 211.7)
- #96655B
#96655B
oklch(55.6% 0.066 32)
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 #407E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.035
- Ocean #017B92 ΔE 0.036
- Stormy Blue #507B9C ΔE 0.037
- Metallic Blue #4F738E ΔE 0.037
- Teal #008080 ΔE 0.038
- Grey Blue #647D8E ΔE 0.041
- Teal Blue #01889F ΔE 0.041
- Deep Aqua #08787F ΔE 0.042
Use #407E8A 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.