#274583
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.11 263), rgb(39, 69, 131).
Aa
White text reads best on this color (9.27:1).
About this color
#274583 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.110 and its hue 263°. 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 9.27:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #274583 |
| RGB | rgb(39, 69, 131) |
| HSL | hsl(220, 54%, 33%) |
| OKLCH | oklch(40.2% 0.11 263) |
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 #274583 | 9.27:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #274583 | 2.26:1 | Fails | Lc 12.9 | Not readable |
| #274583 text on white | 9.27:1 | AAA | Lc 91.1 | Preferred for body text |
| #274583 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EB
oklch(80.9% 0.064 263.3)
-
Step 400
400
#7EA0E1
oklch(70.6% 0.103 262.8)
-
Step 500
500
#5E87D9
oklch(63.1% 0.132 263)
-
Step 600
600
#456FC6
oklch(55.5% 0.143 263.1)
-
Step 700
700
#375DAB
oklch(49.2% 0.132 262.9)
-
Step 800
800 (this color)
#274583
oklch(40.2% 0.11 263)
-
Step 900
900
#29406F
oklch(37.8% 0.086 263.2)
-
Step 950
950
#182641
oklch(27.1% 0.054 262.5)
#274583 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) | #264C85 | 0.020 |
| Deuteranopia (no green cones) | #144382 | 0.019 |
| Tritanopia (no blue cones) | #00535D | 0.090 |
| Achromatopsia (no color) | #474747 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274583
#274583
oklch(40.2% 0.11 263)
- #5E4300
#5E4300
oklch(40.2% 0.083 82.4)
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 #274583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Twilight Blue #0A437A ΔE 0.029
- Light Navy #155084 ΔE 0.033
- Dusk Blue #26538D ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.063
Use #274583 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.