#2F4791
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.126 267.3), rgb(47, 71, 145).
Aa
White text reads best on this color (8.63:1).
About this color
#2F4791 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.126 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #2F4791 |
| RGB | rgb(47, 71, 145) |
| HSL | hsl(225, 51%, 38%) |
| OKLCH | oklch(42.1% 0.126 267.3) |
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 #2F4791 | 8.63:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #2F4791 | 2.43:1 | Fails | Lc 14.6 | Not readable |
| #2F4791 text on white | 8.63:1 | AAA | Lc 89.4 | Fine for body text |
| #2F4791 text on black | 2.43:1 | Fails | Lc -12.9 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F1
oklch(81% 0.073 267.4)
-
Step 400
400
#809EEA
oklch(70.8% 0.117 267)
-
Step 500
500
#6183E4
oklch(63% 0.151 267.4)
-
Step 600
600
#496BD2
oklch(55.7% 0.163 267.2)
-
Step 700
700
#3B58B6
oklch(49.1% 0.153 267.6)
-
Step 800
800 (this color)
#2F4791
oklch(42.1% 0.126 267.3)
-
Step 900
900
#2A3E75
oklch(37.8% 0.097 266.7)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#2F4791 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) | #1E5094 | 0.027 |
| Deuteranopia (no green cones) | #00478F | 0.033 |
| Tritanopia (no blue cones) | #005865 | 0.103 |
| Achromatopsia (no color) | #4C4C4C | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4791
#2F4791
oklch(42.1% 0.126 267.3)
- #614A00
#614A00
oklch(42.2% 0.086 88.1)
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 #2F4791, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Blueberry #464196 ΔE 0.035
- Dusk Blue #26538D ΔE 0.035
- Light Navy #155084 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight Blue #0A437A ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.054
- Twilight #4E518B ΔE 0.055
Use #2F4791 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.