#2F81AA
Closest named color: Steel Blue (#4682B4). oklch(57.2% 0.1 234.4), rgb(47, 129, 170).
Aa
Black text reads best on this color (4.84:1).
About this color
#2F81AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.100 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.025 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #2F81AA |
| RGB | rgb(47, 129, 170) |
| HSL | hsl(200, 57%, 43%) |
| OKLCH | oklch(57.2% 0.1 234.4) |
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 #2F81AA | 4.33:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #2F81AA | 4.84:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #2F81AA text on white | 4.33:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #2F81AA text on black | 4.84:1 | AA | Lc -31.9 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A5C6DA
oklch(80.9% 0.045 234.7)
-
Step 400
400
#73A8C7
oklch(70.6% 0.072 234.9)
-
Step 500
500
#4B92B9
oklch(63% 0.092 234.9)
-
Step 600
600 (this color)
#2F81AA
oklch(57.2% 0.1 234.4)
-
Step 700
700
#1A688D
oklch(49% 0.093 234.6)
-
Step 800
800
#195573
oklch(42.6% 0.078 234.9)
-
Step 900
900
#1C475D
oklch(37.8% 0.06 233.9)
-
Step 950
950
#122936
oklch(26.9% 0.038 235.3)
#2F81AA 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) | #6D80AC | 0.062 |
| Deuteranopia (no green cones) | #5C74A9 | 0.052 |
| Tritanopia (no blue cones) | #008C8F | 0.064 |
| Achromatopsia (no color) | #797979 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F81AA
#2F81AA
oklch(57.2% 0.1 234.4)
- #A5673B
#A5673B
oklch(57.2% 0.099 54.6)
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 #2F81AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.025
- Cerulean #457B9D ΔE 0.026
- Blue NCS #118AB2 ΔE 0.026
- Nice Blue #107AB0 ΔE 0.030
- Cool Blue #4984B8 ΔE 0.033
- Stormy Blue #507B9C ΔE 0.033
- Teal Blue #01889F ΔE 0.034
- Off Blue #5684AE ΔE 0.037
Use #2F81AA 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.