#487D9D
Closest named color: Cerulean (#457B9D). oklch(56.6% 0.075 236.7), rgb(72, 125, 157).
Aa
Black text reads best on this color (4.69:1).
About this color
#487D9D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.075 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.007 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #487D9D |
| RGB | rgb(72, 125, 157) |
| HSL | hsl(203, 37%, 45%) |
| OKLCH | oklch(56.6% 0.075 236.7) |
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 #487D9D | 4.47:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #487D9D | 4.69:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #487D9D text on white | 4.47:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #487D9D 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
#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
#81A6BE
oklch(70.6% 0.054 237)
-
Step 500
500
#6090AE
oklch(63.1% 0.069 236.8)
-
Step 600
600 (this color)
#487D9D
oklch(56.6% 0.075 236.7)
-
Step 700
700
#366783
oklch(49.2% 0.07 235.6)
-
Step 800
800
#2E546B
oklch(42.8% 0.058 236.8)
-
Step 900
900
#294557
oklch(37.6% 0.046 237.9)
-
Step 950
950
#192933
oklch(27.1% 0.028 236.7)
#487D9D 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) | #6E7C9F | 0.045 |
| Deuteranopia (no green cones) | #62739C | 0.039 |
| Tritanopia (no blue cones) | #108588 | 0.058 |
| Achromatopsia (no color) | #777777 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #487D9D
#487D9D
oklch(56.6% 0.075 236.7)
- #986B49
#986B49
oklch(56.6% 0.075 57.6)
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 #487D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.007
- Stormy Blue #507B9C ΔE 0.009
- Dull Blue #49759C ΔE 0.023
- Metallic Blue #4F738E ΔE 0.032
- Off Blue #5684AE ΔE 0.035
- Steel Blue #4682B4 ΔE 0.035
- Grey Blue #647D8E ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.040
Use #487D9D 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.