#2F3DA5
Closest named color: Sapphire (#2138AB). oklch(41.7% 0.167 271.2), rgb(47, 61, 165).
Aa
White text reads best on this color (9.00:1).
About this color
#2F3DA5 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.167 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.023 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #2F3DA5 |
| RGB | rgb(47, 61, 165) |
| HSL | hsl(233, 56%, 42%) |
| OKLCH | oklch(41.7% 0.167 271.2) |
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 #2F3DA5 | 9.00:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #2F3DA5 | 2.33:1 | Fails | Lc 13.8 | Not readable |
| #2F3DA5 text on white | 9.00:1 | AAA | Lc 90.1 | Preferred for body text |
| #2F3DA5 text on black | 2.33:1 | Fails | Lc -12.2 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FE
oklch(88.5% 0.054 271.5)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#4A5FEF
oklch(55.7% 0.216 271.2)
-
Step 700
700
#3C4DD0
oklch(49.1% 0.201 271.1)
-
Step 800
800 (this color)
#2F3DA5
oklch(41.7% 0.167 271.2)
-
Step 900
900
#2A3885
oklch(37.7% 0.13 271.1)
-
Step 950
950
#18224E
oklch(27.1% 0.082 270.4)
#2F3DA5 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) | #004FA8 | 0.048 |
| Deuteranopia (no green cones) | #0044A3 | 0.034 |
| Tritanopia (no blue cones) | #00586B | 0.134 |
| Achromatopsia (no color) | #494949 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3DA5
#2F3DA5
oklch(41.7% 0.167 271.2)
- #5E4A00
#5E4A00
oklch(41.8% 0.085 90.9)
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 #2F3DA5, closest first.
No curated palette has a color within ΔE 0.04 of #2F3DA5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.023
- Blueberry #464196 ΔE 0.043
- Cobalt #1E488F ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.056
- Blue Blue #2242C7 ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.061
- Indigo Blue #3A18B1 ΔE 0.063
- Dusk Blue #26538D ΔE 0.073
Use #2F3DA5 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.