#274B91
Closest named color: Cobalt (#1E488F). oklch(42.6% 0.123 262.1), rgb(39, 75, 145).
Aa
White text reads best on this color (8.39:1).
About this color
#274B91 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.123 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.013 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #274B91 |
| RGB | rgb(39, 75, 145) |
| HSL | hsl(220, 58%, 36%) |
| OKLCH | oklch(42.6% 0.123 262.1) |
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 #274B91 | 8.39:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #274B91 | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #274B91 text on white | 8.39:1 | AAA | Lc 88.6 | Fine for body text |
| #274B91 text on black | 2.50:1 | Fails | Lc -13.6 | 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
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A8C1F0
oklch(80.9% 0.072 262.9)
-
Step 400
400
#79A0E8
oklch(70.7% 0.115 262.1)
-
Step 500
500
#5787E2
oklch(63.2% 0.147 262.1)
-
Step 600
600
#3C6ECF
oklch(55.5% 0.16 262.1)
-
Step 700
700
#2F5CB4
oklch(49.2% 0.149 262.1)
-
Step 800
800 (this color)
#274B91
oklch(42.6% 0.123 262.1)
-
Step 900
900
#243F74
oklch(37.6% 0.097 262.4)
-
Step 950
950
#162644
oklch(27.2% 0.06 262)
#274B91 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) | #265394 | 0.023 |
| Deuteranopia (no green cones) | #0B4990 | 0.021 |
| Tritanopia (no blue cones) | #005B67 | 0.097 |
| Achromatopsia (no color) | #4D4D4D | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274B91
#274B91
oklch(42.6% 0.123 262.1)
- #664900
#664900
oklch(42.6% 0.088 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 #274B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.013
- Dusk Blue #26538D ΔE 0.025
- Light Navy #155084 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.043
- Blueberry #464196 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.053
Use #274B91 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.