#2971B9
Closest named color: Mid Blue (#276AB3). oklch(54.1% 0.133 251.7), rgb(41, 113, 185).
Aa
White text reads best on this color (5.05:1).
About this color
#2971B9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.133 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #2971B9 |
| RGB | rgb(41, 113, 185) |
| HSL | hsl(210, 64%, 44%) |
| OKLCH | oklch(54.1% 0.133 251.7) |
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 #2971B9 | 5.05:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #2971B9 | 4.15:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #2971B9 text on white | 5.05:1 | AA | Lc 74.5 | Content text, not long reading |
| #2971B9 text on black | 4.15:1 | AA large text | Lc -27.2 | Dividers and decoration only |
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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E7
oklch(80.9% 0.06 251.7)
-
Step 400
400
#74A5DB
oklch(70.8% 0.095 251.6)
-
Step 500
500
#4D8DD1
oklch(63.1% 0.122 251.6)
-
Step 600
600 (this color)
#2971B9
oklch(54.1% 0.133 251.7)
-
Step 700
700
#2062A4
oklch(49% 0.124 252)
-
Step 800
800
#1D5185
oklch(42.8% 0.102 251.5)
-
Step 900
900
#1E436A
oklch(37.6% 0.079 251.8)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#2971B9 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) | #4F76BC | 0.039 |
| Deuteranopia (no green cones) | #3869B8 | 0.023 |
| Tritanopia (no blue cones) | #00828C | 0.099 |
| Achromatopsia (no color) | #6F6F6F | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2971B9
#2971B9
oklch(54.1% 0.133 251.7)
- #986200
#986200
oklch(54.2% 0.116 72)
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 #2971B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- Windows Blue #3778BF ΔE 0.025
- French Blue #436BAD ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.032
- Nice Blue #107AB0 ΔE 0.033
- Muted Blue #3B719F ΔE 0.042
- Ocean Blue #03719C ΔE 0.051
- Dull Blue #49759C ΔE 0.056
Use #2971B9 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.