#274585
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.113 263.3), rgb(39, 69, 133).
Aa
White text reads best on this color (9.22:1).
About this color
#274585 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.113 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.018 away. White text reads best on it, at 9.22:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #274585 |
| RGB | rgb(39, 69, 133) |
| HSL | hsl(221, 55%, 34%) |
| OKLCH | oklch(40.4% 0.113 263.3) |
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 #274585 | 9.22:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #274585 | 2.27:1 | Fails | Lc 13.0 | Not readable |
| #274585 text on white | 9.22:1 | AAA | Lc 91.0 | Preferred for body text |
| #274585 text on black | 2.27:1 | Fails | Lc -11.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EC
oklch(80.9% 0.066 263.7)
-
Step 400
400
#7EA0E3
oklch(70.7% 0.106 263.3)
-
Step 500
500
#5E87DB
oklch(63.2% 0.135 263.4)
-
Step 600
600
#446FC8
oklch(55.6% 0.146 263.1)
-
Step 700
700
#365CAD
oklch(49% 0.137 263.3)
-
Step 800
800 (this color)
#274585
oklch(40.4% 0.113 263.3)
-
Step 900
900
#284070
oklch(37.8% 0.088 262.8)
-
Step 950
950
#182642
oklch(27.2% 0.056 263.1)
#274585 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) | #244C87 | 0.020 |
| Deuteranopia (no green cones) | #104384 | 0.021 |
| Tritanopia (no blue cones) | #00545E | 0.093 |
| Achromatopsia (no color) | #474747 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274585
#274585
oklch(40.4% 0.113 263.3)
- #5E4400
#5E4400
oklch(40.4% 0.083 83.7)
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 #274585, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.018
- Twilight Blue #0A437A ΔE 0.031
- Light Navy #155084 ΔE 0.033
- Dusk Blue #26538D ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.063
Use #274585 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.