#487CA4
Closest named color: Cerulean (#457B9D). oklch(56.7% 0.084 243.2), rgb(72, 124, 164).
Aa
Black text reads best on this color (4.69:1).
About this color
#487CA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.084 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.012 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #487CA4 |
| RGB | rgb(72, 124, 164) |
| HSL | hsl(206, 39%, 46%) |
| OKLCH | oklch(56.7% 0.084 243.2) |
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 #487CA4 | 4.47:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #487CA4 | 4.69:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #487CA4 text on white | 4.47:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #487CA4 text on black | 4.69:1 | AA | Lc -30.8 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D8
oklch(80.9% 0.038 244.5)
-
Step 400
400
#80A6C4
oklch(70.8% 0.061 242.5)
-
Step 500
500
#5F8FB5
oklch(63.1% 0.078 243.3)
-
Step 600
600 (this color)
#487CA4
oklch(56.7% 0.084 243.2)
-
Step 700
700
#366589
oklch(49% 0.078 243.5)
-
Step 800
800
#2D5370
oklch(42.7% 0.065 243.2)
-
Step 900
900
#29455A
oklch(37.8% 0.05 242.1)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#487CA4 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) | #6B7CA6 | 0.042 |
| Deuteranopia (no green cones) | #5E73A3 | 0.033 |
| Tritanopia (no blue cones) | #00868A | 0.069 |
| Achromatopsia (no color) | #777777 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #487CA4
#487CA4
oklch(56.7% 0.084 243.2)
- #996B40
#996B40
oklch(56.6% 0.083 62.9)
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 #487CA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.012
- Stormy Blue #507B9C ΔE 0.014
- Dull Blue #49759C ΔE 0.021
- Steel Blue #4682B4 ΔE 0.027
- Off Blue #5684AE ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.034
- Muted Blue #3B719F ΔE 0.036
Use #487CA4 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.