#004987
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.121 252.1), rgb(0, 73, 135).
Aa
White text reads best on this color (9.11:1).
About this color
#004987 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.121 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #004987 |
| RGB | rgb(0, 73, 135) |
| HSL | hsl(208, 100%, 26%) |
| OKLCH | oklch(40.4% 0.121 252.1) |
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 #004987 | 9.11:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #004987 | 2.30:1 | Fails | Lc 13.6 | Not readable |
| #004987 text on white | 9.11:1 | AAA | Lc 90.3 | Preferred for body text |
| #004987 text on black | 2.30:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4EE
oklch(80.9% 0.071 252.6)
-
Step 400
400
#6AA5E5
oklch(70.8% 0.113 251.5)
-
Step 500
500
#3F8CDE
oklch(63.1% 0.145 252.4)
-
Step 600
600
#1674CB
oklch(55.5% 0.157 252.2)
-
Step 700
700
#0261B0
oklch(49% 0.147 252.2)
-
Step 800
800 (this color)
#004987
oklch(40.4% 0.121 252.1)
-
Step 900
900
#144372
oklch(37.8% 0.095 251.9)
-
Step 950
950
#0E2743
oklch(26.9% 0.061 253.2)
#004987 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) | #274E89 | 0.030 |
| Deuteranopia (no green cones) | #074386 | 0.017 |
| Tritanopia (no blue cones) | #005861 | 0.089 |
| Achromatopsia (no color) | #484848 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004987
#004987
oklch(40.4% 0.121 252.1)
- #654000
#654000
oklch(40.5% 0.086 72.5)
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 #004987, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Light Navy #155084 ΔE 0.026
- Twilight Blue #0A437A ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.036
- Dusk Blue #26538D ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.063
- Marine Blue #01386A ΔE 0.067
- Blueberry #464196 ΔE 0.071
Use #004987 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.