#427B87
Closest named color: Metallic Blue (#4F738E). oklch(54.9% 0.063 212.9), rgb(66, 123, 135).
Aa
White text reads best on this color (4.75:1).
About this color
#427B87 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.063 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.032 away. White text reads best on it, at 4.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #427B87 |
| RGB | rgb(66, 123, 135) |
| HSL | hsl(190, 34%, 39%) |
| OKLCH | oklch(54.9% 0.063 212.9) |
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 #427B87 | 4.75:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #427B87 | 4.41:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #427B87 text on white | 4.75:1 | AA | Lc 72.9 | Content text, not long reading |
| #427B87 text on black | 4.41:1 | AA large text | Lc -28.8 | 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
#CEDCDF
oklch(88.5% 0.016 212)
-
Step 300
300
#ADC6CB
oklch(80.9% 0.028 211.1)
-
Step 400
400
#81A8B1
oklch(70.6% 0.044 213.4)
-
Step 500
500
#5F939E
oklch(63.1% 0.058 212.4)
-
Step 600
600 (this color)
#427B87
oklch(54.9% 0.063 212.9)
-
Step 700
700
#356974
oklch(48.9% 0.058 213.1)
-
Step 800
800
#2D565F
oklch(42.7% 0.048 213.6)
-
Step 900
900
#29474D
oklch(37.7% 0.037 211.7)
-
Step 950
950
#182A2D
oklch(27.1% 0.024 209.1)
#427B87 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) | #727788 | 0.059 |
| Deuteranopia (no green cones) | #676F87 | 0.053 |
| Tritanopia (no blue cones) | #19807F | 0.035 |
| Achromatopsia (no color) | #737373 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #427B87
#427B87
oklch(54.9% 0.063 212.9)
- #92645A
#92645A
oklch(54.9% 0.062 32.7)
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 #427B87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.032
- Ocean #017B92 ΔE 0.035
- Cerulean #457B9D ΔE 0.036
- Stormy Blue #507B9C ΔE 0.038
- Deep Aqua #08787F ΔE 0.039
- Teal #008080 ΔE 0.039
- Grey Blue #647D8E ΔE 0.042
- Dull Blue #49759C ΔE 0.044
Use #427B87 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.