#274C9F
Closest named color: Cobalt (#1E488F). oklch(43.9% 0.142 263.6), rgb(39, 76, 159).
Aa
White text reads best on this color (8.01:1).
About this color
#274C9F is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.142 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.030 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #274C9F |
| RGB | rgb(39, 76, 159) |
| HSL | hsl(222, 61%, 39%) |
| OKLCH | oklch(43.9% 0.142 263.6) |
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 #274C9F | 8.01:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #274C9F | 2.62:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #274C9F text on white | 8.01:1 | AAA | Lc 87.4 | Fine for body text |
| #274C9F text on black | 2.62:1 | Fails | Lc -14.8 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF8
oklch(88.6% 0.045 263.1)
-
Step 300
300
#A5C1F7
oklch(80.9% 0.083 263.3)
-
Step 400
400
#759FF3
oklch(70.8% 0.132 263.2)
-
Step 500
500
#5284EF
oklch(63.2% 0.17 263.5)
-
Step 600
600
#386ADD
oklch(55.5% 0.184 263.7)
-
Step 700
700
#2B58C0
oklch(49.1% 0.171 263.7)
-
Step 800
800 (this color)
#274C9F
oklch(43.9% 0.142 263.6)
-
Step 900
900
#223E7B
oklch(37.8% 0.109 263.5)
-
Step 950
950
#142548
oklch(27.1% 0.069 263.1)
#274C9F 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) | #1656A2 | 0.027 |
| Deuteranopia (no green cones) | #004B9D | 0.023 |
| Tritanopia (no blue cones) | #00606E | 0.112 |
| Achromatopsia (no color) | #505050 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274C9F
#274C9F
oklch(43.9% 0.142 263.6)
- #6A4D00
#6A4D00
oklch(44% 0.09 83.6)
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 #274C9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.030
- Dusk Blue #26538D ΔE 0.038
- Blueberry #464196 ΔE 0.045
- Light Navy #155084 ΔE 0.050
- Sapphire #2138AB ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.060
Use #274C9F 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.