#0370A7
Closest named color: Ocean Blue (#03719C). oklch(52.1% 0.12 240.8), rgb(3, 112, 167).
Aa
White text reads best on this color (5.41:1).
About this color
#0370A7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.120 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.019 away. White text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.87:1 |
| White text | 5.41:1 |
Values
| HEX | #0370A7 |
| RGB | rgb(3, 112, 167) |
| HSL | hsl(200, 96%, 33%) |
| OKLCH | oklch(52.1% 0.12 240.8) |
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 #0370A7 | 5.41:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #0370A7 | 3.87:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #0370A7 text on white | 5.41:1 | AA | Lc 76.4 | Fine for body text |
| #0370A7 text on black | 3.87:1 | AA large text | Lc -25.4 | 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 700.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C7DCED
oklch(88.4% 0.033 242.4)
-
Step 300
300
#A0C6E3
oklch(80.9% 0.058 241.3)
-
Step 400
400
#69A8D5
oklch(70.7% 0.093 240.9)
-
Step 500
500
#3A92CA
oklch(63.2% 0.118 240.5)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700 (this color)
#0370A7
oklch(52.1% 0.12 240.8)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#114666
oklch(37.7% 0.077 240.5)
-
Step 950
950
#0C293C
oklch(26.9% 0.049 240.9)
#0370A7 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) | #5571A9 | 0.058 |
| Deuteranopia (no green cones) | #4064A6 | 0.044 |
| Tritanopia (no blue cones) | #007E84 | 0.080 |
| Achromatopsia (no color) | #6A6A6A | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0370A7
#0370A7
oklch(52.1% 0.12 240.8)
- #9A5603
#9A5603
oklch(52.2% 0.12 60.8)
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 #0370A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.019
- Mid Blue #276AB3 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.031
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.033
- Sea Blue #047495 ΔE 0.034
- Peacock Blue #016795 ΔE 0.036
- French Blue #436BAD ΔE 0.040
Use #0370A7 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.