#2371A4
Closest named color: Ocean Blue (#03719C). oklch(52.7% 0.109 242.3), rgb(35, 113, 164).
Aa
White text reads best on this color (5.29:1).
About this color
#2371A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.109 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.018 away. White text reads best on it, at 5.29:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #2371A4 |
| RGB | rgb(35, 113, 164) |
| HSL | hsl(204, 65%, 39%) |
| OKLCH | oklch(52.7% 0.109 242.3) |
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 #2371A4 | 5.29:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #2371A4 | 3.96:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #2371A4 text on white | 5.29:1 | AA | Lc 75.9 | Fine for body text |
| #2371A4 text on black | 3.96:1 | AA large text | Lc -25.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A6C5DE
oklch(80.9% 0.049 242.6)
-
Step 400
400
#74A7CE
oklch(70.7% 0.079 242.1)
-
Step 500
500
#4E90C1
oklch(63% 0.1 242.7)
-
Step 600
600 (this color)
#2371A4
oklch(52.7% 0.109 242.3)
-
Step 700
700
#1F6695
oklch(49% 0.102 242.5)
-
Step 800
800
#1D5479
oklch(42.8% 0.084 242.1)
-
Step 900
900
#1E4561
oklch(37.6% 0.065 242.5)
-
Step 950
950
#132939
oklch(27.1% 0.041 242)
#2371A4 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) | #5972A6 | 0.051 |
| Deuteranopia (no green cones) | #4766A3 | 0.040 |
| Tritanopia (no blue cones) | #007E83 | 0.076 |
| Achromatopsia (no color) | #6B6B6B | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2371A4
#2371A4
oklch(52.7% 0.109 242.3)
- #975A1A
#975A1A
oklch(52.6% 0.11 61.6)
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 #2371A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.018
- Muted Blue #3B719F ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.022
- Nice Blue #107AB0 ΔE 0.028
- Sea Blue #047495 ΔE 0.031
- Mid Blue #276AB3 ΔE 0.034
- French Blue #436BAD ΔE 0.035
- Dull Blue #49759C ΔE 0.037
Use #2371A4 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.