#00487B
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.106 248.1), rgb(0, 72, 123).
Aa
White text reads best on this color (9.48:1).
About this color
#00487B is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.106 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.015 away. White text reads best on it, at 9.48:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.48:1 |
Values
| HEX | #00487B |
| RGB | rgb(0, 72, 123) |
| HSL | hsl(205, 100%, 24%) |
| OKLCH | oklch(39.2% 0.106 248.1) |
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 #00487B | 9.48:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #00487B | 2.21:1 | Fails | Lc 12.6 | Not readable |
| #00487B text on white | 9.48:1 | AAA | Lc 91.4 | Preferred for body text |
| #00487B text on black | 2.21:1 | Fails | Lc -11.0 | Not readable |
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 900.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#98C6F2
oklch(81% 0.079 247.7)
-
Step 400
400
#5AA6EC
oklch(70.6% 0.128 248.3)
-
Step 500
500
#198EE6
oklch(63.1% 0.163 248.2)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900 (this color)
#00487B
oklch(39.2% 0.106 248.1)
-
Step 950
950
#042845
oklch(27% 0.067 247.8)
#00487B 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) | #2E4B7D | 0.035 |
| Deuteranopia (no green cones) | #1A417A | 0.022 |
| Tritanopia (no blue cones) | #00545B | 0.075 |
| Achromatopsia (no color) | #464646 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00487B
#00487B
oklch(39.2% 0.106 248.1)
- #633B00
#633B00
oklch(39.2% 0.086 68)
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 #00487B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.015
- Light Navy #155084 ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.037
- Cobalt #1E488F ΔE 0.039
- Dusk Blue #26538D ΔE 0.051
- Marine Blue #01386A ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.068
Use #00487B 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.