#487B9B
Closest named color: Cerulean (#457B9D). oklch(56% 0.074 237.6), rgb(72, 123, 155).
Aa
White text reads best on this color (4.58:1).
About this color
#487B9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.074 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.004 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.58:1 |
| White text | 4.58:1 |
Values
| HEX | #487B9B |
| RGB | rgb(72, 123, 155) |
| HSL | hsl(203, 37%, 45%) |
| OKLCH | oklch(56% 0.074 237.6) |
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 #487B9B | 4.58:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #487B9B | 4.58:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #487B9B text on white | 4.58:1 | AA | Lc 71.7 | Content text, not long reading |
| #487B9B text on black | 4.58:1 | AA | Lc -30.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#82A6BE
oklch(70.7% 0.053 237.7)
-
Step 500
500
#6190AE
oklch(63.1% 0.068 237.3)
-
Step 600
600 (this color)
#487B9B
oklch(56% 0.074 237.6)
-
Step 700
700
#386683
oklch(49% 0.069 238)
-
Step 800
800
#2F546B
oklch(42.8% 0.057 237.4)
-
Step 900
900
#2A4556
oklch(37.6% 0.044 237.2)
-
Step 950
950
#192933
oklch(27.1% 0.028 236.7)
#487B9B 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) | #6C7A9D | 0.043 |
| Deuteranopia (no green cones) | #61729A | 0.036 |
| Tritanopia (no blue cones) | #158386 | 0.058 |
| Achromatopsia (no color) | #757575 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #487B9B
#487B9B
oklch(56% 0.074 237.6)
- #966948
#966948
oklch(56% 0.075 56.8)
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 #487B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.004
- Stormy Blue #507B9C ΔE 0.009
- Dull Blue #49759C ΔE 0.018
- Metallic Blue #4F738E ΔE 0.026
- Muted Blue #3B719F ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.038
- Grey Blue #647D8E ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
Use #487B9B 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.